20456951 has 2 divisors, whose sum is σ = 20456952. Its totient is φ = 20456950.

The previous prime is 20456941. The next prime is 20456957. The reversal of 20456951 is 15965402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20456951 - 2¹⁰ = 20455927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20456957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228475 + 10228476.

It is an arithmetic number, because the mean of its divisors is an integer number (10228476).

Almost surely, 2^20456951 is an apocalyptic number.

20456951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456951 is an equidigital number, since it uses as much as digits as its factorization.

20456951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 20456951 is about 4522.9361039042. The cubic root of 20456951 is about 273.4934743053.

The spelling of 20456951 in words is "twenty million, four hundred fifty-six thousand, nine hundred fifty-one".