16642940 has 24 divisors (see below), whose sum is σ = 35026992. Its totient is φ = 6642560.

The previous prime is 16642931. The next prime is 16642943. The reversal of 16642940 is 4924661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16642897 and 16642906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642943) 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, 16655 + ... + 17625.

It is an arithmetic number, because the mean of its divisors is an integer number (1459458).

Almost surely, 2^16642940 is an apocalyptic number.

16642940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16642940 is an abundant number, since it is smaller than the sum of its proper divisors (18384052).

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

16642940 is a wasteful number, since it uses less digits than its factorization.

16642940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 16642940 is about 4079.5759583565. The cubic root of 16642940 is about 255.3152067762.

The spelling of 16642940 in words is "sixteen million, six hundred forty-two thousand, nine hundred forty".