20959465951 has 2 divisors, whose sum is σ = 20959465952. Its totient is φ = 20959465950.

The previous prime is 20959465949. The next prime is 20959465987. The reversal of 20959465951 is 15956495902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20959465951 - 2¹ = 20959465949 is a prime.

It is a super-2 number, since 2×20959465951² (a number of 21 digits) contains 22 as substring.

Together with 20959465949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20959465892 and 20959465901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20959465151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10479732975 + 10479732976.

It is an arithmetic number, because the mean of its divisors is an integer number (10479732976).

Almost surely, 2^20959465951 is an apocalyptic number.

20959465951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20959465951 is an equidigital number, since it uses as much as digits as its factorization.

20959465951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374000, while the sum is 55.

The spelling of 20959465951 in words is "twenty billion, nine hundred fifty-nine million, four hundred sixty-five thousand, nine hundred fifty-one".