20887049331 has 12 divisors (see below), whose sum is σ = 30266576808. Its totient is φ = 13880209824.

The previous prime is 20887049263. The next prime is 20887049333. The reversal of 20887049331 is 13394078802.

20887049331 is a `hidden beast` number, since 208 + 8 + 70 + 49 + 331 = 666.

It is not a de Polignac number, because 20887049331 - 2¹⁰ = 20887048307 is a prime.

It is a super-2 number, since 2×20887049331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20887049333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3704505 + ... + 3710138.

It is an arithmetic number, because the mean of its divisors is an integer number (2522214734).

Almost surely, 2^20887049331 is an apocalyptic number.

20887049331 is a deficient number, since it is larger than the sum of its proper divisors (9379527477).

20887049331 is a wasteful number, since it uses less digits than its factorization.

20887049331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7414962 (or 7414959 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20887049331 in words is "twenty billion, eight hundred eighty-seven million, forty-nine thousand, three hundred thirty-one".