20370739531 has 2 divisors, whose sum is σ = 20370739532. Its totient is φ = 20370739530.

The previous prime is 20370739523. The next prime is 20370739541. The reversal of 20370739531 is 13593707302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20370739531 - 2³ = 20370739523 is a prime.

It is a super-2 number, since 2×20370739531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20370739511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185369765 + 10185369766.

It is an arithmetic number, because the mean of its divisors is an integer number (10185369766).

Almost surely, 2^20370739531 is an apocalyptic number.

20370739531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20370739531 is an equidigital number, since it uses as much as digits as its factorization.

20370739531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 40.

The spelling of 20370739531 in words is "twenty billion, three hundred seventy million, seven hundred thirty-nine thousand, five hundred thirty-one".