20364474 has 32 divisors (see below), whose sum is σ = 44218944. Its totient is φ = 6215040.

The previous prime is 20364457. The next prime is 20364479. The reversal of 20364474 is 47446302.

It is not an unprimeable number, because it can be changed into a prime (20364479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9222 + ... + 11214.

It is an arithmetic number, because the mean of its divisors is an integer number (1381842).

Almost surely, 2^20364474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20364474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22109472).

20364474 is an abundant number, since it is smaller than the sum of its proper divisors (23854470).

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

20364474 is a wasteful number, since it uses less digits than its factorization.

20364474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 20364474 is about 4512.7014082476. The cubic root of 20364474 is about 273.0807366300.

The spelling of 20364474 in words is "twenty million, three hundred sixty-four thousand, four hundred seventy-four".