11257447923 has 18 divisors (see below), whose sum is σ = 17273542884. Its totient is φ = 7063495104.

The previous prime is 11257447919. The next prime is 11257447963. The reversal of 11257447923 is 32974475211.

11257447923 is a `hidden beast` number, since 1 + 1 + 2 + 574 + 4 + 79 + 2 + 3 = 666.

It is not a de Polignac number, because 11257447923 - 2² = 11257447919 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11257447963) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2161461 + ... + 2166662.

Almost surely, 2^11257447923 is an apocalyptic number.

11257447923 is a deficient number, since it is larger than the sum of its proper divisors (6016094961).

11257447923 is a wasteful number, since it uses less digits than its factorization.

11257447923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328163 (or 4328143 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 11257447923 in words is "eleven billion, two hundred fifty-seven million, four hundred forty-seven thousand, nine hundred twenty-three".