23194985402 has 32 divisors (see below), whose sum is σ = 37591590672. Its totient is φ = 10692957184.

The previous prime is 23194985393. The next prime is 23194985441. The reversal of 23194985402 is 20458949132.

It is a happy number.

It is a Cunningham number, because it is equal to 152299²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 16721334721 + 6473650681 = 129311^2 + 80459^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1210448 + ... + 1229460.

Almost surely, 2^23194985402 is an apocalyptic number.

23194985402 is a deficient number, since it is larger than the sum of its proper divisors (14396605270).

23194985402 is a wasteful number, since it uses less digits than its factorization.

23194985402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19762.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 23194985402 in words is "twenty-three billion, one hundred ninety-four million, nine hundred eighty-five thousand, four hundred two".