20398402364 has 24 divisors (see below), whose sum is σ = 36729162960. Its totient is φ = 9905366016.

The previous prime is 20398402363. The next prime is 20398402373. The reversal of 20398402364 is 46320489302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398402361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 45029 + ... + 206940.

It is an arithmetic number, because the mean of its divisors is an integer number (1530381790).

Almost surely, 2^20398402364 is an apocalyptic number.

It is an amenable number.

20398402364 is a deficient number, since it is larger than the sum of its proper divisors (16330760596).

20398402364 is a wasteful number, since it uses less digits than its factorization.

20398402364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252557 (or 252555 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 20398402364 in words is "twenty billion, three hundred ninety-eight million, four hundred two thousand, three hundred sixty-four".