16905742 has 32 divisors (see below), whose sum is σ = 29917440. Its totient is φ = 7015680.

The previous prime is 16905737. The next prime is 16905767. The reversal of 16905742 is 24750961.

It is a super-2 number, since 2×16905742² = 571608225141128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16905698 and 16905707.

It is a congruent number.

It is an unprimeable number.

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, 80017 + ... + 80227.

It is an arithmetic number, because the mean of its divisors is an integer number (934920).

Almost surely, 2^16905742 is an apocalyptic number.

16905742 is a deficient number, since it is larger than the sum of its proper divisors (13011698).

16905742 is a wasteful number, since it uses less digits than its factorization.

16905742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 16905742 is about 4111.6592757669. The cubic root of 16905742 is about 256.6520547893.

The spelling of 16905742 in words is "sixteen million, nine hundred five thousand, seven hundred forty-two".