20542286961 has 40 divisors (see below), whose sum is σ = 35121138624. Its totient is φ = 11721477600.

The previous prime is 20542286911. The next prime is 20542286969. The reversal of 20542286961 is 16968224502.

20542286961 is a `hidden beast` number, since 20 + 542 + 2 + 86 + 9 + 6 + 1 = 666.

It is not a de Polignac number, because 20542286961 - 2¹⁵ = 20542254193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20542286969) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 371626 + ... + 423308.

Almost surely, 2^20542286961 is an apocalyptic number.

20542286961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20542286961 is a deficient number, since it is larger than the sum of its proper divisors (14578851663).

20542286961 is an equidigital number, since it uses as much as digits as its factorization.

20542286961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52403 (or 52394 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20542286961 in words is "twenty billion, five hundred forty-two million, two hundred eighty-six thousand, nine hundred sixty-one".