20626916437 has 4 divisors (see below), whose sum is σ = 20662056576. Its totient is φ = 20591776300.

The previous prime is 20626916417. The next prime is 20626916483. The reversal of 20626916437 is 73461962602.

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-20626916437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626916407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17569189 + ... + 17570362.

It is an arithmetic number, because the mean of its divisors is an integer number (5165514144).

Almost surely, 2^20626916437 is an apocalyptic number.

It is an amenable number.

20626916437 is a deficient number, since it is larger than the sum of its proper divisors (35140139).

20626916437 is an equidigital number, since it uses as much as digits as its factorization.

20626916437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35140138.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 20626916437 in words is "twenty billion, six hundred twenty-six million, nine hundred sixteen thousand, four hundred thirty-seven".