21196361560 has 64 divisors (see below), whose sum is σ = 52044249600. Its totient is φ = 7705276800.

The previous prime is 21196361531. The next prime is 21196361591. The reversal of 21196361560 is 6516369112.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1868305 + ... + 1879615.

It is an arithmetic number, because the mean of its divisors is an integer number (813191400).

Almost surely, 2^21196361560 is an apocalyptic number.

21196361560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21196361560 is an abundant number, since it is smaller than the sum of its proper divisors (30847888040).

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

21196361560 is a wasteful number, since it uses less digits than its factorization.

21196361560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15592 (or 15588 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 21196361560 in words is "twenty-one billion, one hundred ninety-six million, three hundred sixty-one thousand, five hundred sixty".