20531257230 has 32 divisors (see below), whose sum is σ = 53754565248. Its totient is φ = 4977274400.

The previous prime is 20531257169. The next prime is 20531257247. The reversal of 20531257230 is 3275213502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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, 31107636 + ... + 31108295.

It is an arithmetic number, because the mean of its divisors is an integer number (1679830164).

Almost surely, 2^20531257230 is an apocalyptic number.

20531257230 is an abundant number, since it is smaller than the sum of its proper divisors (33223308018).

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

20531257230 is a wasteful number, since it uses less digits than its factorization.

20531257230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62215952.

The product of its (nonzero) digits is 12600, while the sum is 30.

The spelling of 20531257230 in words is "twenty billion, five hundred thirty-one million, two hundred fifty-seven thousand, two hundred thirty".