23418651640 has 32 divisors (see below), whose sum is σ = 52784622000. Its totient is φ = 9350988544.

The previous prime is 23418651637. The next prime is 23418651679. The reversal of 23418651640 is 4615681432.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 23418651593 and 23418651602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491710 + ... + 537229.

Almost surely, 2^23418651640 is an apocalyptic number.

23418651640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23418651640 is an abundant number, since it is smaller than the sum of its proper divisors (29365970360).

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

23418651640 is a wasteful number, since it uses less digits than its factorization.

23418651640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029519 (or 1029515 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 23418651640 in words is "twenty-three billion, four hundred eighteen million, six hundred fifty-one thousand, six hundred forty".