20153351420 has 72 divisors (see below), whose sum is σ = 45592152480. Its totient is φ = 7480130560.

The previous prime is 20153351399. The next prime is 20153351431. The reversal of 20153351420 is 2415335102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20153351420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385826 + ... + 434934.

It is an arithmetic number, because the mean of its divisors is an integer number (633224340).

Almost surely, 2^20153351420 is an apocalyptic number.

20153351420 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 20153351420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22796076240).

20153351420 is an abundant number, since it is smaller than the sum of its proper divisors (25438801060).

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

20153351420 is a wasteful number, since it uses less digits than its factorization.

20153351420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49223 (or 49204 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20153351420 its reverse (2415335102), we get a palindrome (22568686522).

The spelling of 20153351420 in words is "twenty billion, one hundred fifty-three million, three hundred fifty-one thousand, four hundred twenty".