21031431000140 has 144 divisors (see below), whose sum is σ = 51105943983360. Its totient is φ = 7244599824000.

The previous prime is 21031431000101. The next prime is 21031431000157. The reversal of 21031431000140 is 4100013413012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 953752115 + ... + 953774165.

Almost surely, 2^{21031431000140} is an apocalyptic number.

21031431000140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031431000140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25552971991680).

21031431000140 is an abundant number, since it is smaller than the sum of its proper divisors (30074512983220).

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

21031431000140 is a wasteful number, since it uses less digits than its factorization.

21031431000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42844 (or 42831 counting only the distinct ones).

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

Adding to 21031431000140 its reverse (4100013413012), we get a palindrome (25131444413152).

The spelling of 21031431000140 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, one hundred forty", and thus it is an aban number.