20538674455 has 32 divisors (see below), whose sum is σ = 26947105920. Its totient is φ = 14936194560.

The previous prime is 20538674399. The next prime is 20538674479. The reversal of 20538674455 is 55447683502.

It is not a de Polignac number, because 20538674455 - 2⁹ = 20538673943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20538674399 and 20538674408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5116029 + ... + 5120041.

It is an arithmetic number, because the mean of its divisors is an integer number (842097060).

Almost surely, 2^20538674455 is an apocalyptic number.

20538674455 is a deficient number, since it is larger than the sum of its proper divisors (6408431465).

20538674455 is a wasteful number, since it uses less digits than its factorization.

20538674455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211.

The product of its (nonzero) digits is 4032000, while the sum is 49.

It can be divided in two parts, 205386 and 74455, that added together give a 4-th power (279841 = 23⁴).

The spelling of 20538674455 in words is "twenty billion, five hundred thirty-eight million, six hundred seventy-four thousand, four hundred fifty-five".