18878923432 has 8 divisors (see below), whose sum is σ = 35397981450. Its totient is φ = 9439461712.

The previous prime is 18878923423. The next prime is 18878923471. The reversal of 18878923432 is 23432987881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14401440036 + 4477483396 = 120006^2 + 66914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×18878923432⁴ (a number of 42 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1179932707 + ... + 1179932722.

Almost surely, 2^18878923432 is an apocalyptic number.

It is an amenable number.

18878923432 is a deficient number, since it is larger than the sum of its proper divisors (16519058018).

18878923432 is a wasteful number, since it uses less digits than its factorization.

18878923432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359865435 (or 2359865431 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The spelling of 18878923432 in words is "eighteen billion, eight hundred seventy-eight million, nine hundred twenty-three thousand, four hundred thirty-two".