20394749402 has 8 divisors (see below), whose sum is σ = 31578966912. Its totient is φ = 9868427100.

The previous prime is 20394749399. The next prime is 20394749411. The reversal of 20394749402 is 20494749302.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164473724 + ... + 164473847.

It is an arithmetic number, because the mean of its divisors is an integer number (3947370864).

Almost surely, 2^20394749402 is an apocalyptic number.

20394749402 is a deficient number, since it is larger than the sum of its proper divisors (11184217510).

20394749402 is a wasteful number, since it uses less digits than its factorization.

20394749402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328947604.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 20394749402 in words is "twenty billion, three hundred ninety-four million, seven hundred forty-nine thousand, four hundred two".