90921600019 has 2 divisors, whose sum is σ = 90921600020. Its totient is φ = 90921600018.

The previous prime is 90921599999. The next prime is 90921600037. The reversal of 90921600019 is 91000612909.

It is a strong prime.

It is an emirp because it is prime and its reverse (91000612909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90921600019 - 2¹¹ = 90921597971 is a prime.

It is a super-2 number, since 2×90921600019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90921600079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45460800009 + 45460800010.

It is an arithmetic number, because the mean of its divisors is an integer number (45460800010).

Almost surely, 2^90921600019 is an apocalyptic number.

90921600019 is a deficient number, since it is larger than the sum of its proper divisors (1).

90921600019 is an equidigital number, since it uses as much as digits as its factorization.

90921600019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 90921600019 in words is "ninety billion, nine hundred twenty-one million, six hundred thousand, nineteen".