20672670 has 16 divisors (see below), whose sum is σ = 49614480. Its totient is φ = 5512704.

The previous prime is 20672669. The next prime is 20672671. The reversal of 20672670 is 7627602.

It is an interprime number because it is at equal distance from previous prime (20672669) and next prime (20672671).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 689089 = 20672670 / (2 + 0 + 6 + 7 + 2 + 6 + 7 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672671) 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, 344515 + ... + 344574.

It is an arithmetic number, because the mean of its divisors is an integer number (3100905).

Almost surely, 2^20672670 is an apocalyptic number.

20672670 is an abundant number, since it is smaller than the sum of its proper divisors (28941810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20672670 is a wasteful number, since it uses less digits than its factorization.

20672670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689099.

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

The square root of 20672670 is about 4546.7207963542. The cubic root of 20672670 is about 274.4514464507.

The spelling of 20672670 in words is "twenty million, six hundred seventy-two thousand, six hundred seventy".