21592357061 has 4 divisors (see below), whose sum is σ = 23555298624. Its totient is φ = 19629415500.

The previous prime is 21592357051. The next prime is 21592357063. The reversal of 21592357061 is 16075329512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21592357061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21592357063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981470765 + ... + 981470786.

It is an arithmetic number, because the mean of its divisors is an integer number (5888824656).

Almost surely, 2^21592357061 is an apocalyptic number.

It is an amenable number.

21592357061 is a deficient number, since it is larger than the sum of its proper divisors (1962941563).

21592357061 is a wasteful number, since it uses less digits than its factorization.

21592357061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962941562.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 21592357061 in words is "twenty-one billion, five hundred ninety-two million, three hundred fifty-seven thousand, sixty-one".