20672379 has 48 divisors (see below), whose sum is σ = 37669632. Its totient is φ = 10632384.

The previous prime is 20672371. The next prime is 20672411. The reversal of 20672379 is 97327602.

It is not a de Polignac number, because 20672379 - 2³ = 20672371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20672371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34924 + ... + 35510.

It is an arithmetic number, because the mean of its divisors is an integer number (784784).

Almost surely, 2^20672379 is an apocalyptic number.

20672379 is a deficient number, since it is larger than the sum of its proper divisors (16997253).

20672379 is a wasteful number, since it uses less digits than its factorization.

20672379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20672379 is about 4546.6887951563. The cubic root of 20672379 is about 274.4501586676.

The spelling of 20672379 in words is "twenty million, six hundred seventy-two thousand, three hundred seventy-nine".