21250641434502 has 16 divisors (see below), whose sum is σ = 42501469677120. Its totient is φ = 7083516010152.

The previous prime is 21250641434501. The next prime is 21250641434507. The reversal of 21250641434502 is 20543414605212.

It is a super-2 number, since 2×21250641434502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21250641434501) 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, 6282568 + ... + 9053835.

It is an arithmetic number, because the mean of its divisors is an integer number (2656341854820).

Almost surely, 2^{21250641434502} is an apocalyptic number.

21250641434502 is an abundant number, since it is smaller than the sum of its proper divisors (21250828242618).

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

21250641434502 is a wasteful number, since it uses less digits than its factorization.

21250641434502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15567347.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 21250641434502 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred thirty-four thousand, five hundred two".