23445621 has 24 divisors (see below), whose sum is σ = 35418240. Its totient is φ = 14930496.

The previous prime is 23445593. The next prime is 23445647. The reversal of 23445621 is 12654432.

23445621 is a `hidden beast` number, since 2 + 34 + 4 + 5 + 621 = 666.

It is not a de Polignac number, because 23445621 - 2⁵ = 23445589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23443621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17545 + ... + 18833.

It is an arithmetic number, because the mean of its divisors is an integer number (1475760).

Almost surely, 2^23445621 is an apocalyptic number.

It is an amenable number.

23445621 is a deficient number, since it is larger than the sum of its proper divisors (11972619).

23445621 is a wasteful number, since it uses less digits than its factorization.

23445621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1382 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 23445621 is about 4842.0678433909. The cubic root of 23445621 is about 286.2116100636.

The spelling of 23445621 in words is "twenty-three million, four hundred forty-five thousand, six hundred twenty-one".