20734407 has 32 divisors (see below), whose sum is σ = 32832000. Its totient is φ = 12887424.

The previous prime is 20734403. The next prime is 20734411. The reversal of 20734407 is 70443702.

It is an interprime number because it is at equal distance from previous prime (20734403) and next prime (20734411).

It is not a de Polignac number, because 20734407 - 2² = 20734403 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91228 + ... + 91454.

It is an arithmetic number, because the mean of its divisors is an integer number (1026000).

Almost surely, 2^20734407 is an apocalyptic number.

20734407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20734407 is a deficient number, since it is larger than the sum of its proper divisors (12097593).

20734407 is a wasteful number, since it uses less digits than its factorization.

20734407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20734407 is about 4553.5049137999. The cubic root of 20734407 is about 274.7243828097.

The spelling of 20734407 in words is "twenty million, seven hundred thirty-four thousand, four hundred seven".