20022905 has 16 divisors (see below), whose sum is σ = 28408320. Its totient is φ = 13255872.

The previous prime is 20022901. The next prime is 20022911. The reversal of 20022905 is 50922002.

It is not a de Polignac number, because 20022905 - 2² = 20022901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20022901) 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, 8849 + ... + 10878.

It is an arithmetic number, because the mean of its divisors is an integer number (1775520).

Almost surely, 2^20022905 is an apocalyptic number.

It is an amenable number.

20022905 is a deficient number, since it is larger than the sum of its proper divisors (8385415).

20022905 is a wasteful number, since it uses less digits than its factorization.

20022905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19768.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20022905 is about 4474.6960790650. The cubic root of 20022905 is about 271.5453450191.

Adding to 20022905 its reverse (50922002), we get a palindrome (70944907).

The spelling of 20022905 in words is "twenty million, twenty-two thousand, nine hundred five".