49195000021 has 2 divisors, whose sum is σ = 49195000022. Its totient is φ = 49195000020.

The previous prime is 49195000007. The next prime is 49195000031. The reversal of 49195000021 is 12000059194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46805159025 + 2389840996 = 216345^2 + 48886^2 .

It is a cyclic number.

It is not a de Polignac number, because 49195000021 - 2¹⁷ = 49194868949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49195000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24597500010 + 24597500011.

It is an arithmetic number, because the mean of its divisors is an integer number (24597500011).

Almost surely, 2^49195000021 is an apocalyptic number.

It is an amenable number.

49195000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49195000021 is an equidigital number, since it uses as much as digits as its factorization.

49195000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 49195000021 in words is "forty-nine billion, one hundred ninety-five million, twenty-one", and thus it is an aban number.