99423456994 has 16 divisors (see below), whose sum is σ = 160324502400. Its totient is φ = 46093292784.

The previous prime is 99423456989. The next prime is 99423457019. The reversal of 99423456994 is 49965432499.

99423456994 = T₂₅₇₄₅₂ + T₂₅₇₄₅₃ + T₂₅₇₄₅₄.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27832329 + ... + 27835900.

It is an arithmetic number, because the mean of its divisors is an integer number (10020281400).

Almost surely, 2^99423456994 is an apocalyptic number.

99423456994 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

99423456994 is the 257454-th centered triangular number.

99423456994 is a deficient number, since it is larger than the sum of its proper divisors (60901045406).

99423456994 is a wasteful number, since it uses less digits than its factorization.

99423456994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55668297.

The product of its digits is 75582720, while the sum is 64.

The spelling of 99423456994 in words is "ninety-nine billion, four hundred twenty-three million, four hundred fifty-six thousand, nine hundred ninety-four".