21507460625383 has 2 divisors, whose sum is σ = 21507460625384. Its totient is φ = 21507460625382.

The previous prime is 21507460625341. The next prime is 21507460625461. The reversal of 21507460625383 is 38352606470512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21507460625383 - 2¹³ = 21507460617191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21507460625383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21507460625983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753730312691 + 10753730312692.

It is an arithmetic number, because the mean of its divisors is an integer number (10753730312692).

Almost surely, 2^{21507460625383} is an apocalyptic number.

21507460625383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507460625383 is an equidigital number, since it uses as much as digits as its factorization.

21507460625383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 21507460625383 in words is "twenty-one trillion, five hundred seven billion, four hundred sixty million, six hundred twenty-five thousand, three hundred eighty-three".