21873257010 has 80 divisors (see below), whose sum is σ = 64161580032. Its totient is φ = 5302605600.

The previous prime is 21873256991. The next prime is 21873257017. The reversal of 21873257010 is 1075237812.

21873257010 is a `hidden beast` number, since 2 + 1 + 8 + 73 + 2 + 570 + 10 = 666.

It is not an unprimeable number, because it can be changed into a prime (21873257017) 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, 1218546 + ... + 1236365.

Almost surely, 2^21873257010 is an apocalyptic number.

21873257010 is an abundant number, since it is smaller than the sum of its proper divisors (42288323022).

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

21873257010 is a wasteful number, since it uses less digits than its factorization.

21873257010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454941 (or 2454932 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 21873257010 in words is "twenty-one billion, eight hundred seventy-three million, two hundred fifty-seven thousand, ten".