21590740860437 has 32 divisors (see below), whose sum is σ = 25586297616384. Its totient is φ = 17828526643200.

The previous prime is 21590740860421. The next prime is 21590740860443. The reversal of 21590740860437 is 73406804709512.

It is not a de Polignac number, because 21590740860437 - 2⁴ = 21590740860421 is a prime.

It is a super-2 number, since 2×21590740860437² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21590740860407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51206237 + ... + 51626157.

It is an arithmetic number, because the mean of its divisors is an integer number (799571800512).

It is a 1-persistent number, because it is pandigital, but 2⋅21590740860437 = 43181481720874 is not.

Almost surely, 2^{21590740860437} is an apocalyptic number.

It is an amenable number.

21590740860437 is a deficient number, since it is larger than the sum of its proper divisors (3995556755947).

21590740860437 is a wasteful number, since it uses less digits than its factorization.

21590740860437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421029.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 21590740860437 in words is "twenty-one trillion, five hundred ninety billion, seven hundred forty million, eight hundred sixty thousand, four hundred thirty-seven".