21310314140 has 24 divisors (see below), whose sum is σ = 44937361392. Its totient is φ = 8488753920.

The previous prime is 21310314089. The next prime is 21310314149. The reversal of 21310314140 is 4141301312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310314149) 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, 2205794 + ... + 2215433.

It is an arithmetic number, because the mean of its divisors is an integer number (1872390058).

Almost surely, 2^21310314140 is an apocalyptic number.

21310314140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310314140 is an abundant number, since it is smaller than the sum of its proper divisors (23627047252).

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

21310314140 is a wasteful number, since it uses less digits than its factorization.

21310314140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421477 (or 4421475 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21310314140 its reverse (4141301312), we get a palindrome (25451615452).

The spelling of 21310314140 in words is "twenty-one billion, three hundred ten million, three hundred fourteen thousand, one hundred forty".