20218900234 has 32 divisors (see below), whose sum is σ = 33114251520. Its totient is φ = 9202669632.

The previous prime is 20218900223. The next prime is 20218900243. The reversal of 20218900234 is 43200981202.

It is a junction number, because it is equal to n+sod(n) for n = 20218900196 and 20218900205.

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, 1857552 + ... + 1868404.

It is an arithmetic number, because the mean of its divisors is an integer number (1034820360).

Almost surely, 2^20218900234 is an apocalyptic number.

20218900234 is a deficient number, since it is larger than the sum of its proper divisors (12895351286).

20218900234 is a wasteful number, since it uses less digits than its factorization.

20218900234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11854.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 20218900234 in words is "twenty billion, two hundred eighteen million, nine hundred thousand, two hundred thirty-four".