21004202998 has 8 divisors (see below), whose sum is σ = 32592728880. Its totient is φ = 10139960040.

The previous prime is 21004202993. The next prime is 21004203029. The reversal of 21004202998 is 89920240012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004202993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181070658 + ... + 181070773.

It is an arithmetic number, because the mean of its divisors is an integer number (4074091110).

Almost surely, 2^21004202998 is an apocalyptic number.

21004202998 is a deficient number, since it is larger than the sum of its proper divisors (11588525882).

21004202998 is a wasteful number, since it uses less digits than its factorization.

21004202998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362141462.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 21004202998 in words is "twenty-one billion, four million, two hundred two thousand, nine hundred ninety-eight".