21425057250004 has 6 divisors (see below), whose sum is σ = 37493850187514. Its totient is φ = 10712528625000.

The previous prime is 21425057249941. The next prime is 21425057250101. The reversal of 21425057250004 is 40005275052412.

It can be written as a sum of positive squares in only one way, i.e., 12056242284100 + 9368814965904 = 3472210^2 + 3060852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678132156247 + ... + 2678132156254.

Almost surely, 2^{21425057250004} is an apocalyptic number.

It is an amenable number.

21425057250004 is a deficient number, since it is larger than the sum of its proper divisors (16068792937510).

21425057250004 is a wasteful number, since it uses less digits than its factorization.

21425057250004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356264312505 (or 5356264312503 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 37.

The spelling of 21425057250004 in words is "twenty-one trillion, four hundred twenty-five billion, fifty-seven million, two hundred fifty thousand, four".