18921762230 has 32 divisors (see below), whose sum is σ = 39362137920. Its totient is φ = 6414566400.

The previous prime is 18921762221. The next prime is 18921762283. The reversal of 18921762230 is 3226712981.

It is a congruent number.

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, 1512371 + ... + 1524830.

It is an arithmetic number, because the mean of its divisors is an integer number (1230066810).

Almost surely, 2^18921762230 is an apocalyptic number.

18921762230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18921762230 is an abundant number, since it is smaller than the sum of its proper divisors (20440375690).

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

18921762230 is a wasteful number, since it uses less digits than its factorization.

18921762230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037304.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 18921762230 in words is "eighteen billion, nine hundred twenty-one million, seven hundred sixty-two thousand, two hundred thirty".