21101049798 has 16 divisors (see below), whose sum is σ = 42212882496. Its totient is φ = 7031886120.

The previous prime is 21101049793. The next prime is 21101049799. The reversal of 21101049798 is 89794010112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101049793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423736 + ... + 470907.

It is an arithmetic number, because the mean of its divisors is an integer number (2638305156).

Almost surely, 2^21101049798 is an apocalyptic number.

21101049798 is an abundant number, since it is smaller than the sum of its proper divisors (21111832698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101049798 is a wasteful number, since it uses less digits than its factorization.

21101049798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898579.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 21101049798 in words is "twenty-one billion, one hundred one million, forty-nine thousand, seven hundred ninety-eight".