15897982220 has 12 divisors (see below), whose sum is σ = 33385762704. Its totient is φ = 6359192880.

The previous prime is 15897982201. The next prime is 15897982249. The reversal of 15897982220 is 2228979851.

It is a super-2 number, since 2×15897982220² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397449536 + ... + 397449575.

It is an arithmetic number, because the mean of its divisors is an integer number (2782146892).

Almost surely, 2^15897982220 is an apocalyptic number.

15897982220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15897982220 is an abundant number, since it is smaller than the sum of its proper divisors (17487780484).

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

15897982220 is a wasteful number, since it uses less digits than its factorization.

15897982220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794899120 (or 794899118 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 15897982220 in words is "fifteen billion, eight hundred ninety-seven million, nine hundred eighty-two thousand, two hundred twenty".