21131314040 has 16 divisors (see below), whose sum is σ = 47545456680. Its totient is φ = 8452525600.

The previous prime is 21131314033. The next prime is 21131314091. The reversal of 21131314040 is 4041313112.

It is a super-2 number, since 2×21131314040² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264141386 + ... + 264141465.

Almost surely, 2^21131314040 is an apocalyptic number.

21131314040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131314040 is an abundant number, since it is smaller than the sum of its proper divisors (26414142640).

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

21131314040 is a wasteful number, since it uses less digits than its factorization.

21131314040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528282862 (or 528282858 counting only the distinct ones).

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

Adding to 21131314040 its reverse (4041313112), we get a palindrome (25172627152).

The spelling of 21131314040 in words is "twenty-one billion, one hundred thirty-one million, three hundred fourteen thousand, forty".