18406953 has 32 divisors (see below), whose sum is σ = 29289600. Its totient is φ = 11389248.

The previous prime is 18406951. The next prime is 18406979. The reversal of 18406953 is 35960481.

It is not a de Polignac number, because 18406953 - 2¹ = 18406951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18406951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26851 + ... + 27527.

It is an arithmetic number, because the mean of its divisors is an integer number (915300).

Almost surely, 2^18406953 is an apocalyptic number.

It is an amenable number.

18406953 is a deficient number, since it is larger than the sum of its proper divisors (10882647).

18406953 is a wasteful number, since it uses less digits than its factorization.

18406953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 18406953 is about 4290.3325045968. The cubic root of 18406953 is about 264.0344738039.

The spelling of 18406953 in words is "eighteen million, four hundred six thousand, nine hundred fifty-three".