20179642 has 16 divisors (see below), whose sum is σ = 35399232. Its totient is φ = 8447040.

The previous prime is 20179639. The next prime is 20179693. The reversal of 20179642 is 24697102.

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, 16159 + ... + 17362.

It is an arithmetic number, because the mean of its divisors is an integer number (2212452).

Almost surely, 2^20179642 is an apocalyptic number.

20179642 is a deficient number, since it is larger than the sum of its proper divisors (15219590).

20179642 is a wasteful number, since it uses less digits than its factorization.

20179642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33573.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20179642 is about 4492.1756421583. The cubic root of 20179642 is about 272.2520461440.

The spelling of 20179642 in words is "twenty million, one hundred seventy-nine thousand, six hundred forty-two".