21167437260 has 24 divisors (see below), whose sum is σ = 59268824496. Its totient is φ = 5644649920.

The previous prime is 21167437259. The next prime is 21167437261. The reversal of 21167437260 is 6273476112.

It is an interprime number because it is at equal distance from previous prime (21167437259) and next prime (21167437261).

It is not an unprimeable number, because it can be changed into a prime (21167437261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176395251 + ... + 176395370.

It is an arithmetic number, because the mean of its divisors is an integer number (2469534354).

Almost surely, 2^21167437260 is an apocalyptic number.

21167437260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21167437260 is an abundant number, since it is smaller than the sum of its proper divisors (38101387236).

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

21167437260 is a wasteful number, since it uses less digits than its factorization.

21167437260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352790633 (or 352790631 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 21167437260 in words is "twenty-one billion, one hundred sixty-seven million, four hundred thirty-seven thousand, two hundred sixty".