16506994 has 16 divisors (see below), whose sum is σ = 28395648. Its totient is φ = 7049952.

The previous prime is 16506967. The next prime is 16507021. The reversal of 16506994 is 49960561.

It is an interprime number because it is at equal distance from previous prime (16506967) and next prime (16507021).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2499 + ... + 6265.

It is an arithmetic number, because the mean of its divisors is an integer number (1774728).

Almost surely, 2^16506994 is an apocalyptic number.

16506994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16506994 is a deficient number, since it is larger than the sum of its proper divisors (11888654).

16506994 is a wasteful number, since it uses less digits than its factorization.

16506994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 16506994 is about 4062.8800129957. The cubic root of 16506994 is about 254.6181340621.

The spelling of 16506994 in words is "sixteen million, five hundred six thousand, nine hundred ninety-four".