20525251385 has 16 divisors (see below), whose sum is σ = 24887347200. Its totient is φ = 16249654080.

The previous prime is 20525251363. The next prime is 20525251421. The reversal of 20525251385 is 58315252502.

It is not a de Polignac number, because 20525251385 - 2²⁴ = 20508474169 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151064 + ... + 252726.

It is an arithmetic number, because the mean of its divisors is an integer number (1555459200).

Almost surely, 2^20525251385 is an apocalyptic number.

It is an amenable number.

20525251385 is a deficient number, since it is larger than the sum of its proper divisors (4362095815).

20525251385 is a wasteful number, since it uses less digits than its factorization.

20525251385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102088.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 20525251385 in words is "twenty billion, five hundred twenty-five million, two hundred fifty-one thousand, three hundred eighty-five".