20881498951 has 2 divisors, whose sum is σ = 20881498952. Its totient is φ = 20881498950.

The previous prime is 20881498933. The next prime is 20881498987. The reversal of 20881498951 is 15989418802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20881498951 - 2⁹ = 20881498439 is a prime.

It is a super-2 number, since 2×20881498951² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20881498892 and 20881498901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20881498931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10440749475 + 10440749476.

It is an arithmetic number, because the mean of its divisors is an integer number (10440749476).

Almost surely, 2^20881498951 is an apocalyptic number.

20881498951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20881498951 is an equidigital number, since it uses as much as digits as its factorization.

20881498951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 55.

The spelling of 20881498951 in words is "twenty billion, eight hundred eighty-one million, four hundred ninety-eight thousand, nine hundred fifty-one".