16951990 has 32 divisors (see below), whose sum is σ = 35043840. Its totient is φ = 5839200.

The previous prime is 16951981. The next prime is 16951993. The reversal of 16951990 is 9915961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16951993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (1095120).

Almost surely, 2^16951990 is an apocalyptic number.

16951990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16951990 is an abundant number, since it is smaller than the sum of its proper divisors (18091850).

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

16951990 is a wasteful number, since it uses less digits than its factorization.

16951990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 16951990 is about 4117.2794415730. The cubic root of 16951990 is about 256.8858774547.

The spelling of 16951990 in words is "sixteen million, nine hundred fifty-one thousand, nine hundred ninety".