20157110553 has 16 divisors (see below), whose sum is σ = 28048694400. Its totient is φ = 12851967744.

The previous prime is 20157110551. The next prime is 20157110639. The reversal of 20157110553 is 35501175102.

It is not a de Polignac number, because 20157110553 - 2¹ = 20157110551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20157110553.

It is not an unprimeable number, because it can be changed into a prime (20157110551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594075 + ... + 627087.

It is an arithmetic number, because the mean of its divisors is an integer number (1753043400).

Almost surely, 2^20157110553 is an apocalyptic number.

20157110553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20157110553 is a deficient number, since it is larger than the sum of its proper divisors (7891583847).

20157110553 is a wasteful number, since it uses less digits than its factorization.

20157110553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41888.

The product of its (nonzero) digits is 5250, while the sum is 30.

Adding to 20157110553 its reverse (35501175102), we get a palindrome (55658285655).

The spelling of 20157110553 in words is "twenty billion, one hundred fifty-seven million, one hundred ten thousand, five hundred fifty-three".