20210399894 has 8 divisors (see below), whose sum is σ = 30598923528. Its totient is φ = 10010758720.

The previous prime is 20210399887. The next prime is 20210399927. The reversal of 20210399894 is 49899301202.

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

It is a super-2 number, since 2×20210399894² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47220347 + ... + 47220774.

It is an arithmetic number, because the mean of its divisors is an integer number (3824865441).

Almost surely, 2^20210399894 is an apocalyptic number.

20210399894 is a deficient number, since it is larger than the sum of its proper divisors (10388523634).

20210399894 is a wasteful number, since it uses less digits than its factorization.

20210399894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94441230.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 20210399894 in words is "twenty billion, two hundred ten million, three hundred ninety-nine thousand, eight hundred ninety-four".