20157505455 has 32 divisors (see below), whose sum is σ = 35326756800. Its totient is φ = 9769367552.

The previous prime is 20157505429. The next prime is 20157505457. The reversal of 20157505455 is 55450575102.

It is a cyclic number.

It is not a de Polignac number, because 20157505455 - 2¹⁶ = 20157439919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157505457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1355520 + ... + 1370309.

It is an arithmetic number, because the mean of its divisors is an integer number (1103961150).

Almost surely, 2^20157505455 is an apocalyptic number.

20157505455 is a deficient number, since it is larger than the sum of its proper divisors (15169251345).

20157505455 is a wasteful number, since it uses less digits than its factorization.

20157505455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725883.

The product of its (nonzero) digits is 175000, while the sum is 39.

The spelling of 20157505455 in words is "twenty billion, one hundred fifty-seven million, five hundred five thousand, four hundred fifty-five".