20620407 has 8 divisors (see below), whose sum is σ = 27515520. Its totient is φ = 13736120.

The previous prime is 20620399. The next prime is 20620423. The reversal of 20620407 is 70402602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20620407 - 2³ = 20620399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620427) 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, 4432 + ... + 7802.

It is an arithmetic number, because the mean of its divisors is an integer number (3439440).

Almost surely, 2^20620407 is an apocalyptic number.

20620407 is a deficient number, since it is larger than the sum of its proper divisors (6895113).

20620407 is a wasteful number, since it uses less digits than its factorization.

20620407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20620407 is about 4540.9698303336. The cubic root of 20620407 is about 274.2199691677.

The spelling of 20620407 in words is "twenty million, six hundred twenty thousand, four hundred seven".