20090951 has 2 divisors, whose sum is σ = 20090952. Its totient is φ = 20090950.

The previous prime is 20090927. The next prime is 20090969. The reversal of 20090951 is 15909002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20090951 - 2⁶ = 20090887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20090951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20090971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045475 + 10045476.

It is an arithmetic number, because the mean of its divisors is an integer number (10045476).

Almost surely, 2^20090951 is an apocalyptic number.

20090951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20090951 is an equidigital number, since it uses as much as digits as its factorization.

20090951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 20090951 is about 4482.2930515530. The cubic root of 20090951 is about 271.8526045057.

Adding to 20090951 its reverse (15909002), we get a palindrome (35999953).

The spelling of 20090951 in words is "twenty million, ninety thousand, nine hundred fifty-one".