20329407 has 16 divisors (see below), whose sum is σ = 34420480. Its totient is φ = 11616696.

The previous prime is 20329363. The next prime is 20329417. The reversal of 20329407 is 70492302.

It is not a de Polignac number, because 20329407 - 2⁷ = 20329279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20329417) 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, 53593 + ... + 53970.

It is an arithmetic number, because the mean of its divisors is an integer number (2151280).

Almost surely, 2^20329407 is an apocalyptic number.

20329407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20329407 is a deficient number, since it is larger than the sum of its proper divisors (14091073).

20329407 is a wasteful number, since it uses less digits than its factorization.

20329407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107579 (or 107573 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20329407 is about 4508.8143674363. The cubic root of 20329407 is about 272.9239010209.

It can be divided in two parts, 20329 and 407, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20329407 in words is "twenty million, three hundred twenty-nine thousand, four hundred seven".