21131440062 has 16 divisors (see below), whose sum is σ = 44748932112. Its totient is φ = 6629471360.

The previous prime is 21131440061. The next prime is 21131440069. The reversal of 21131440062 is 26004413112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131440061) 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, 103585389 + ... + 103585592.

It is an arithmetic number, because the mean of its divisors is an integer number (2796808257).

Almost surely, 2^21131440062 is an apocalyptic number.

21131440062 is an abundant number, since it is smaller than the sum of its proper divisors (23617492050).

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

21131440062 is a wasteful number, since it uses less digits than its factorization.

21131440062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207171003.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21131440062 its reverse (26004413112), we get a palindrome (47135853174).

The spelling of 21131440062 in words is "twenty-one billion, one hundred thirty-one million, four hundred forty thousand, sixty-two".