20055807 has 6 divisors (see below), whose sum is σ = 28969512. Its totient is φ = 13370532.

The previous prime is 20055803. The next prime is 20055821. The reversal of 20055807 is 70855002.

It is a happy number.

It is not a de Polignac number, because 20055807 - 2² = 20055803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1114203 + ... + 1114220.

It is an arithmetic number, because the mean of its divisors is an integer number (4828252).

Almost surely, 2^20055807 is an apocalyptic number.

20055807 is a deficient number, since it is larger than the sum of its proper divisors (8913705).

20055807 is a wasteful number, since it uses less digits than its factorization.

20055807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228429 (or 2228426 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 20055807 is about 4478.3710208066. The cubic root of 20055807 is about 271.6939997005.

The spelling of 20055807 in words is "twenty million, fifty-five thousand, eight hundred seven".