19930402 has 8 divisors (see below), whose sum is σ = 30030336. Its totient is φ = 9920292.

The previous prime is 19930399. The next prime is 19930429. The reversal of 19930402 is 20403991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21898 + ... + 22789.

It is an arithmetic number, because the mean of its divisors is an integer number (3753792).

Almost surely, 2^19930402 is an apocalyptic number.

19930402 is a deficient number, since it is larger than the sum of its proper divisors (10099934).

19930402 is a wasteful number, since it uses less digits than its factorization.

19930402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44912.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19930402 is about 4464.3478807100. The cubic root of 19930402 is about 271.1265323252.

The spelling of 19930402 in words is "nineteen million, nine hundred thirty thousand, four hundred two".