20455051 has 2 divisors, whose sum is σ = 20455052. Its totient is φ = 20455050.

The previous prime is 20455013. The next prime is 20455081. The reversal of 20455051 is 15055402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20455051 - 2⁷ = 20454923 is a prime.

It is a super-2 number, since 2×20455051² = 836818222825202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20455081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227525 + 10227526.

It is an arithmetic number, because the mean of its divisors is an integer number (10227526).

Almost surely, 2^20455051 is an apocalyptic number.

20455051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20455051 is an equidigital number, since it uses as much as digits as its factorization.

20455051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20455051 is about 4522.7260584740. The cubic root of 20455051 is about 273.4850068706.

It can be divided in two parts, 204 and 55051, that added together give a palindrome (55255).

The spelling of 20455051 in words is "twenty million, four hundred fifty-five thousand, fifty-one".