23721005642 has 16 divisors (see below), whose sum is σ = 36769483872. Its totient is φ = 11469973200.

The previous prime is 23721005621. The next prime is 23721005653. The reversal of 23721005642 is 24650012732.

It is a super-2 number, since 2×23721005642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23721005599 and 23721005608.

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, 1356788 + ... + 1374159.

It is an arithmetic number, because the mean of its divisors is an integer number (2298092742).

Almost surely, 2^23721005642 is an apocalyptic number.

23721005642 is a deficient number, since it is larger than the sum of its proper divisors (13048478230).

23721005642 is a wasteful number, since it uses less digits than its factorization.

23721005642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731093.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 23721005642 in words is "twenty-three billion, seven hundred twenty-one million, five thousand, six hundred forty-two".