20538670590 has 24 divisors (see below), whose sum is σ = 53400543768. Its totient is φ = 5476978800.

The previous prime is 20538670589. The next prime is 20538670613. The reversal of 20538670590 is 9507683502.

It is a happy number.

20538670590 is a `hidden beast` number, since 2 + 0 + 53 + 8 + 6 + 7 + 0 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114103636 + ... + 114103815.

It is an arithmetic number, because the mean of its divisors is an integer number (2225022657).

Almost surely, 2^20538670590 is an apocalyptic number.

20538670590 is an abundant number, since it is smaller than the sum of its proper divisors (32861873178).

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

20538670590 is a wasteful number, since it uses less digits than its factorization.

20538670590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228207464 (or 228207461 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 20538670590 in words is "twenty billion, five hundred thirty-eight million, six hundred seventy thousand, five hundred ninety".