2817953000021 has 2 divisors, whose sum is σ = 2817953000022. Its totient is φ = 2817953000020.

The previous prime is 2817952999997. The next prime is 2817953000063. The reversal of 2817953000021 is 1200003597182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2657861787025 + 160091212996 = 1630295^2 + 400114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2817953000021 is a prime.

It is a super-2 number, since 2×2817953000021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2817953000321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1408976500010 + 1408976500011.

It is an arithmetic number, because the mean of its divisors is an integer number (1408976500011).

Almost surely, 2^{2817953000021} is an apocalyptic number.

It is an amenable number.

2817953000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2817953000021 is an equidigital number, since it uses as much as digits as its factorization.

2817953000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 2817953000021 in words is "two trillion, eight hundred seventeen billion, nine hundred fifty-three million, twenty-one", and thus it is an aban number.