20674731 has 16 divisors (see below), whose sum is σ = 34368768. Its totient is φ = 10740000.

The previous prime is 20674729. The next prime is 20674733. The reversal of 20674731 is 13747602.

It is an interprime number because it is at equal distance from previous prime (20674729) and next prime (20674733).

It is not a de Polignac number, because 20674731 - 2¹ = 20674729 is a prime.

It is a super-2 number, since 2×20674731² = 854889003844722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20674733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44520 + ... + 44981.

It is an arithmetic number, because the mean of its divisors is an integer number (2148048).

Almost surely, 2^20674731 is an apocalyptic number.

20674731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20674731 is a deficient number, since it is larger than the sum of its proper divisors (13694037).

20674731 is a wasteful number, since it uses less digits than its factorization.

20674731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89522.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20674731 is about 4546.9474375673. The cubic root of 20674731 is about 274.4605667955.

The spelling of 20674731 in words is "twenty million, six hundred seventy-four thousand, seven hundred thirty-one".