20672783 has 8 divisors (see below), whose sum is σ = 21085440. Its totient is φ = 20263320.

The previous prime is 20672767. The next prime is 20672803. The reversal of 20672783 is 38727602.

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 20672783 - 2⁴ = 20672767 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 (20672083) 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, 15368 + ... + 16658.

It is an arithmetic number, because the mean of its divisors is an integer number (2635680).

Almost surely, 2^20672783 is an apocalyptic number.

20672783 is a deficient number, since it is larger than the sum of its proper divisors (412657).

20672783 is a wasteful number, since it uses less digits than its factorization.

20672783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20672783 is about 4546.7332228755. The cubic root of 20672783 is about 274.4519465144.

The spelling of 20672783 in words is "twenty million, six hundred seventy-two thousand, seven hundred eighty-three".