21230220986 has 32 divisors (see below), whose sum is σ = 34940263680. Its totient is φ = 9614805696.

The previous prime is 21230220961. The next prime is 21230221013. The reversal of 21230220986 is 68902203212.

It is a super-2 number, since 2×21230220986² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842015 + ... + 866861.

It is an arithmetic number, because the mean of its divisors is an integer number (1091883240).

Almost surely, 2^21230220986 is an apocalyptic number.

21230220986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21230220986 is a deficient number, since it is larger than the sum of its proper divisors (13710042694).

21230220986 is a wasteful number, since it uses less digits than its factorization.

21230220986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25478.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21230220986 in words is "twenty-one billion, two hundred thirty million, two hundred twenty thousand, nine hundred eighty-six".