21142235048 has 32 divisors (see below), whose sum is σ = 43251300000. Its totient is φ = 9608813760.

The previous prime is 21142235039. The next prime is 21142235087. The reversal of 21142235048 is 84053224112.

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, 1008578 + ... + 1029326.

It is an arithmetic number, because the mean of its divisors is an integer number (1351603125).

Almost surely, 2^21142235048 is an apocalyptic number.

It is an amenable number.

21142235048 is an abundant number, since it is smaller than the sum of its proper divisors (22109064952).

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

21142235048 is a wasteful number, since it uses less digits than its factorization.

21142235048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32345 (or 32341 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 21142235048 in words is "twenty-one billion, one hundred forty-two million, two hundred thirty-five thousand, forty-eight".