21020222798 has 8 divisors (see below), whose sum is σ = 33385059792. Its totient is φ = 9891869536.

The previous prime is 21020222791. The next prime is 21020222807. The reversal of 21020222798 is 89722202012.

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 (21020222791) 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, 309120890 + ... + 309120957.

It is an arithmetic number, because the mean of its divisors is an integer number (4173132474).

Almost surely, 2^21020222798 is an apocalyptic number.

21020222798 is a deficient number, since it is larger than the sum of its proper divisors (12364836994).

21020222798 is a wasteful number, since it uses less digits than its factorization.

21020222798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618241866.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 21020222798 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, seven hundred ninety-eight".