21401811360 has 192 divisors, whose sum is σ = 79312867200. Its totient is φ = 5371416576.

The previous prime is 21401811331. The next prime is 21401811371. The reversal of 21401811360 is 6311810412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72270 + ... + 219149.

It is an arithmetic number, because the mean of its divisors is an integer number (413087850).

Almost surely, 2^21401811360 is an apocalyptic number.

21401811360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401811360 is an abundant number, since it is smaller than the sum of its proper divisors (57911055840).

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

21401811360 is a wasteful number, since it uses less digits than its factorization.

21401811360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291460 (or 291446 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 21401811360 in words is "twenty-one billion, four hundred one million, eight hundred eleven thousand, three hundred sixty".