18345701 has 4 divisors (see below), whose sum is σ = 20013504. Its totient is φ = 16677900.

The previous prime is 18345683. The next prime is 18345709. The reversal of 18345701 is 10754381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10754381 = 11 ⋅977671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18345701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833885 + ... + 833906.

It is an arithmetic number, because the mean of its divisors is an integer number (5003376).

Almost surely, 2^18345701 is an apocalyptic number.

18345701 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18345701 is the 1916-th centered decagonal number.

It is an amenable number.

18345701 is a deficient number, since it is larger than the sum of its proper divisors (1667803).

18345701 is a wasteful number, since it uses less digits than its factorization.

18345701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667802.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18345701 is about 4283.1881817170. The cubic root of 18345701 is about 263.7412764124.

The spelling of 18345701 in words is "eighteen million, three hundred forty-five thousand, seven hundred one".