20153144540 has 48 divisors (see below), whose sum is σ = 43545421920. Its totient is φ = 7830224640.

The previous prime is 20153144527. The next prime is 20153144567. The reversal of 20153144540 is 4544135102.

It is a super-2 number, since 2×20153144540² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90926 + ... + 220394.

It is an arithmetic number, because the mean of its divisors is an integer number (907196290).

Almost surely, 2^20153144540 is an apocalyptic number.

20153144540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20153144540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772710960).

20153144540 is an abundant number, since it is smaller than the sum of its proper divisors (23392277380).

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

20153144540 is a wasteful number, since it uses less digits than its factorization.

20153144540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129702 (or 129700 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20153144540 its reverse (4544135102), we get a palindrome (24697279642).

The spelling of 20153144540 in words is "twenty billion, one hundred fifty-three million, one hundred forty-four thousand, five hundred forty".