20017074 has 64 divisors (see below), whose sum is σ = 51305472. Its totient is φ = 5054400.

The previous prime is 20017043. The next prime is 20017091. The reversal of 20017074 is 47071002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20017074.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16509 + ... + 17679.

It is an arithmetic number, because the mean of its divisors is an integer number (801648).

Almost surely, 2^20017074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20017074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25652736).

20017074 is an abundant number, since it is smaller than the sum of its proper divisors (31288398).

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

20017074 is a wasteful number, since it uses less digits than its factorization.

20017074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20017074 is about 4474.0444789921. The cubic root of 20017074 is about 271.5189829664.

Adding to 20017074 its reverse (47071002), we get a palindrome (67088076).

The spelling of 20017074 in words is "twenty million, seventeen thousand, seventy-four".