140021420520 has 64 divisors (see below), whose sum is σ = 429001816320. Its totient is φ = 36544596224.

The previous prime is 140021420509. The next prime is 140021420543. The reversal of 140021420520 is 25024120041.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12407607 + ... + 12418886.

It is an arithmetic number, because the mean of its divisors is an integer number (6703153380).

Almost surely, 2^140021420520 is an apocalyptic number.

140021420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140021420520 is an abundant number, since it is smaller than the sum of its proper divisors (288980395800).

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

140021420520 is a wasteful number, since it uses less digits than its factorization.

140021420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24826554 (or 24826550 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 140021420520 its reverse (25024120041), we get a palindrome (165045540561).

The spelling of 140021420520 in words is "one hundred forty billion, twenty-one million, four hundred twenty thousand, five hundred twenty".