21250422342020 has 12 divisors (see below), whose sum is σ = 44625886918284. Its totient is φ = 8500168936800.

The previous prime is 21250422342007. The next prime is 21250422342031. The reversal of 21250422342020 is 2024322405212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16854112101376 + 4396310240644 = 4105376^2 + 2096738^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531260558531 + ... + 531260558570.

It is an arithmetic number, because the mean of its divisors is an integer number (3718823909857).

Almost surely, 2^{21250422342020} is an apocalyptic number.

21250422342020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21250422342020 is an abundant number, since it is smaller than the sum of its proper divisors (23375464576264).

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

21250422342020 is a wasteful number, since it uses less digits than its factorization.

21250422342020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062521117110 (or 1062521117108 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 21250422342020 its reverse (2024322405212), we get a palindrome (23274744747232).

The spelling of 21250422342020 in words is "twenty-one trillion, two hundred fifty billion, four hundred twenty-two million, three hundred forty-two thousand, twenty".