21150024535988 has 24 divisors (see below), whose sum is σ = 37167262396992. Its totient is φ = 10530882601344.

The previous prime is 21150024535963. The next prime is 21150024536029. The reversal of 21150024535988 is 88953542005112.

It is a happy number.

It is a super-2 number, since 2×21150024535988² (a number of 27 digits) contains 22 as substring.

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, 8371256 + ... + 10600847.

It is an arithmetic number, because the mean of its divisors is an integer number (1548635933208).

Almost surely, 2^{21150024535988} is an apocalyptic number.

It is an amenable number.

21150024535988 is a deficient number, since it is larger than the sum of its proper divisors (16017237861004).

21150024535988 is a wasteful number, since it uses less digits than its factorization.

21150024535988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18973271 (or 18973269 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 21150024535988 in words is "twenty-one trillion, one hundred fifty billion, twenty-four million, five hundred thirty-five thousand, nine hundred eighty-eight".