21410254140 has 96 divisors (see below), whose sum is σ = 65430844416. Its totient is φ = 5187805440.

The previous prime is 21410254123. The next prime is 21410254147. The reversal of 21410254140 is 4145201412.

It is a self number, because there is not a number n which added to its sum of digits gives 21410254140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410254147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565974 + ... + 1579586.

It is an arithmetic number, because the mean of its divisors is an integer number (681571296).

Almost surely, 2^21410254140 is an apocalyptic number.

21410254140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21410254140 is an abundant number, since it is smaller than the sum of its proper divisors (44020590276).

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

21410254140 is a wasteful number, since it uses less digits than its factorization.

21410254140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16019 (or 16017 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 21410254140 its reverse (4145201412), we get a palindrome (25555455552).

The spelling of 21410254140 in words is "twenty-one billion, four hundred ten million, two hundred fifty-four thousand, one hundred forty".