20794237461 has 10 divisors (see below), whose sum is σ = 31062996822. Its totient is φ = 13862824920.

The previous prime is 20794237441. The next prime is 20794237481. The reversal of 20794237461 is 16473249702.

It is an interprime number because it is at equal distance from previous prime (20794237441) and next prime (20794237481).

It can be written as a sum of positive squares in only one way, i.e., 18877111236 + 1917126225 = 137394^2 + 43785^2 .

It is not a de Polignac number, because 20794237461 - 2⁷ = 20794237333 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20794237411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 128359410 + ... + 128359571.

Almost surely, 2^20794237461 is an apocalyptic number.

It is an amenable number.

20794237461 is a deficient number, since it is larger than the sum of its proper divisors (10268759361).

20794237461 is an equidigital number, since it uses as much as digits as its factorization.

20794237461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256718993 (or 256718984 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 20794237461 in words is "twenty billion, seven hundred ninety-four million, two hundred thirty-seven thousand, four hundred sixty-one".