16642520 has 32 divisors (see below), whose sum is σ = 38739600. Its totient is φ = 6427008.

The previous prime is 16642519. The next prime is 16642529. The reversal of 16642520 is 2524661.

It is a self number, because there is not a number n which added to its sum of digits gives 16642520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6014 + ... + 8333.

Almost surely, 2^16642520 is an apocalyptic number.

16642520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16642520 is an abundant number, since it is smaller than the sum of its proper divisors (22097080).

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

16642520 is a wasteful number, since it uses less digits than its factorization.

16642520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387 (or 14383 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 16642520 is about 4079.5244820935. The cubic root of 16642520 is about 255.3130590529.

The spelling of 16642520 in words is "sixteen million, six hundred forty-two thousand, five hundred twenty".