20980948402951 has 2 divisors, whose sum is σ = 20980948402952. Its totient is φ = 20980948402950.

The previous prime is 20980948402927. The next prime is 20980948403021. The reversal of 20980948402951 is 15920484908902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20980948402951 - 2¹¹ = 20980948400903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20980948402951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20980948402901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10490474201475 + 10490474201476.

It is an arithmetic number, because the mean of its divisors is an integer number (10490474201476).

Almost surely, 2^{20980948402951} is an apocalyptic number.

20980948402951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20980948402951 is an equidigital number, since it uses as much as digits as its factorization.

20980948402951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 20980948402951 in words is "twenty trillion, nine hundred eighty billion, nine hundred forty-eight million, four hundred two thousand, nine hundred fifty-one".