20153103534 has 128 divisors (see below), whose sum is σ = 47477145600. Its totient is φ = 6327767520.

The previous prime is 20153103533. The next prime is 20153103557. The reversal of 20153103534 is 43530135102.

20153103534 is a `hidden beast` number, since 20 + 1 + 5 + 3 + 103 + 534 = 666.

It is a super-2 number, since 2×20153103534² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20153103498 and 20153103507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153103533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10567009 + ... + 10568915.

It is an arithmetic number, because the mean of its divisors is an integer number (370915200).

Almost surely, 2^20153103534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20153103534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23738572800).

20153103534 is an abundant number, since it is smaller than the sum of its proper divisors (27324042066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20153103534 is a wasteful number, since it uses less digits than its factorization.

20153103534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 20153103534 its reverse (43530135102), we get a palindrome (63683238636).

The spelling of 20153103534 in words is "twenty billion, one hundred fifty-three million, one hundred three thousand, five hundred thirty-four".