20812967 has 8 divisors (see below), whose sum is σ = 23832096. Its totient is φ = 17805312.

The previous prime is 20812943. The next prime is 20812973. The reversal of 20812967 is 76921802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20812967 - 2¹² = 20808871 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 (20412967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1463 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (2979012).

Almost surely, 2^20812967 is an apocalyptic number.

20812967 is a deficient number, since it is larger than the sum of its proper divisors (3019129).

20812967 is an equidigital number, since it uses as much as digits as its factorization.

20812967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 20812967 is about 4562.1230803213. The cubic root of 20812967 is about 275.0709106393.

The spelling of 20812967 in words is "twenty million, eight hundred twelve thousand, nine hundred sixty-seven".