21888151677 has 144 divisors (see below), whose sum is σ = 39729930240. Its totient is φ = 11542741056.

The previous prime is 21888151633. The next prime is 21888151711. The reversal of 21888151677 is 77615188812.

It is not a de Polignac number, because 21888151677 - 2⁶ = 21888151613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21888151177) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 71296758 + ... + 71297064.

Almost surely, 2^21888151677 is an apocalyptic number.

It is an amenable number.

21888151677 is a deficient number, since it is larger than the sum of its proper divisors (17841778563).

21888151677 is a wasteful number, since it uses less digits than its factorization.

21888151677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 530 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 54.

The spelling of 21888151677 in words is "twenty-one billion, eight hundred eighty-eight million, one hundred fifty-one thousand, six hundred seventy-seven".