20950407 has 20 divisors (see below), whose sum is σ = 32945880. Its totient is φ = 13230864.

The previous prime is 20950403. The next prime is 20950411. The reversal of 20950407 is 70405902.

20950407 is a `hidden beast` number, since 209 + 50 + 407 = 666.

It is an interprime number because it is at equal distance from previous prime (20950403) and next prime (20950411).

It is not a de Polignac number, because 20950407 - 2² = 20950403 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 (20950403) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5268 + ... + 8345.

It is an arithmetic number, because the mean of its divisors is an integer number (1647294).

Almost surely, 2^20950407 is an apocalyptic number.

20950407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20950407 is a deficient number, since it is larger than the sum of its proper divisors (11995473).

20950407 is a wasteful number, since it uses less digits than its factorization.

20950407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13644 (or 13635 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20950407 is about 4577.1614566235. The cubic root of 20950407 is about 275.6750665679.

The spelling of 20950407 in words is "twenty million, nine hundred fifty thousand, four hundred seven".