19790042402 has 32 divisors (see below), whose sum is σ = 32304050688. Its totient is φ = 9038143296.

The previous prime is 19790042387. The next prime is 19790042411. The reversal of 19790042402 is 20424009791.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5174663 + ... + 5178485.

It is an arithmetic number, because the mean of its divisors is an integer number (1009501584).

Almost surely, 2^19790042402 is an apocalyptic number.

19790042402 is a deficient number, since it is larger than the sum of its proper divisors (12514008286).

19790042402 is a wasteful number, since it uses less digits than its factorization.

19790042402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 19790042402 in words is "nineteen billion, seven hundred ninety million, forty-two thousand, four hundred two".