20251888745652 has 72 divisors (see below), whose sum is σ = 51695047447680. Its totient is φ = 6684344441280.

The previous prime is 20251888745603. The next prime is 20251888745681. The reversal of 20251888745652 is 25654788815202.

20251888745652 is a `hidden beast` number, since 2 + 0 + 2 + 51 + 8 + 8 + 87 + 456 + 52 = 666.

It is a super-2 number, since 2×20251888745652² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20251888745652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33476377 + ... + 34075967.

Almost surely, 2^{20251888745652} is an apocalyptic number.

It is an amenable number.

20251888745652 is an abundant number, since it is smaller than the sum of its proper divisors (31443158702028).

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

20251888745652 is a wasteful number, since it uses less digits than its factorization.

20251888745652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608813 (or 608808 counting only the distinct ones).

The product of its (nonzero) digits is 86016000, while the sum is 63.

The spelling of 20251888745652 in words is "twenty trillion, two hundred fifty-one billion, eight hundred eighty-eight million, seven hundred forty-five thousand, six hundred fifty-two".