21754464760 has 64 divisors (see below), whose sum is σ = 56131185600. Its totient is φ = 7433189376.

The previous prime is 21754464757. The next prime is 21754464761. The reversal of 21754464760 is 6746445712.

It is a self number, because there is not a number n which added to its sum of digits gives 21754464760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21754464761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50545 + ... + 214624.

It is an arithmetic number, because the mean of its divisors is an integer number (877049775).

Almost surely, 2^21754464760 is an apocalyptic number.

21754464760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21754464760 is an abundant number, since it is smaller than the sum of its proper divisors (34376720840).

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

21754464760 is a wasteful number, since it uses less digits than its factorization.

21754464760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265480 (or 265476 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 21754464760 in words is "twenty-one billion, seven hundred fifty-four million, four hundred sixty-four thousand, seven hundred sixty".