20672651 has 8 divisors (see below), whose sum is σ = 21470064. Its totient is φ = 19889280.

The previous prime is 20672633. The next prime is 20672657. The reversal of 20672651 is 15627602.

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

It is a cyclic number.

It is not a de Polignac number, because 20672651 - 2¹⁰ = 20671627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20672657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (2683758).

Almost surely, 2^20672651 is an apocalyptic number.

20672651 is a deficient number, since it is larger than the sum of its proper divisors (797413).

20672651 is an equidigital number, since it uses as much as digits as its factorization.

20672651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20672651 is about 4546.7187069358. The cubic root of 20672651 is about 274.4513623690.

The spelling of 20672651 in words is "twenty million, six hundred seventy-two thousand, six hundred fifty-one".