21150830488 has 32 divisors (see below), whose sum is σ = 39967642800. Its totient is φ = 10492872192.

The previous prime is 21150830473. The next prime is 21150830501. The reversal of 21150830488 is 88403805112.

It is a super-2 number, since 2×21150830488² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21150830488.

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, 2963308 + ... + 2970436.

Almost surely, 2^21150830488 is an apocalyptic number.

It is an amenable number.

21150830488 is a deficient number, since it is larger than the sum of its proper divisors (18816812312).

21150830488 is a wasteful number, since it uses less digits than its factorization.

21150830488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979 (or 9975 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 21150830488 in words is "twenty-one billion, one hundred fifty million, eight hundred thirty thousand, four hundred eighty-eight".