18213752970 has 48 divisors (see below), whose sum is σ = 54120867840. Its totient is φ = 4163143392.

The previous prime is 18213752929. The next prime is 18213752971. The reversal of 18213752970 is 7925731281.

18213752970 is a `hidden beast` number, since 1 + 8 + 21 + 37 + 529 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18213752971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14454730 + ... + 14455989.

It is an arithmetic number, because the mean of its divisors is an integer number (1127518080).

Almost surely, 2^18213752970 is an apocalyptic number.

18213752970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18213752970 is an abundant number, since it is smaller than the sum of its proper divisors (35907114870).

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

18213752970 is a wasteful number, since it uses less digits than its factorization.

18213752970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28910739 (or 28910736 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 18213752970 in words is "eighteen billion, two hundred thirteen million, seven hundred fifty-two thousand, nine hundred seventy".