20937079 has 4 divisors (see below), whose sum is σ = 21502984. Its totient is φ = 20371176.

The previous prime is 20937071. The next prime is 20937083. The reversal of 20937079 is 97073902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20937079 - 2³ = 20937071 is a prime.

It is a super-2 number, since 2×20937079² = 876722554104482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 565867 = 20937079 / (2 + 0 + 9 + 3 + 7 + 0 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20937071) 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, 282897 + ... + 282970.

It is an arithmetic number, because the mean of its divisors is an integer number (5375746).

Almost surely, 2^20937079 is an apocalyptic number.

20937079 is a deficient number, since it is larger than the sum of its proper divisors (565905).

20937079 is an equidigital number, since it uses as much as digits as its factorization.

20937079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565904.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20937079 is about 4575.7053008252. The cubic root of 20937079 is about 275.6165955209.

The spelling of 20937079 in words is "twenty million, nine hundred thirty-seven thousand, seventy-nine".