20394474 has 16 divisors (see below), whose sum is σ = 41891808. Its totient is φ = 6614352.

The previous prime is 20394469. The next prime is 20394481. The reversal of 20394474 is 47449302.

Added to its reverse (47449302) it gives a triangular number (67843776 = T₁₁₆₄₈).

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, 45712 + ... + 46155.

It is an arithmetic number, because the mean of its divisors is an integer number (2618238).

Almost surely, 2^20394474 is an apocalyptic number.

20394474 is an abundant number, since it is smaller than the sum of its proper divisors (21497334).

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

20394474 is a wasteful number, since it uses less digits than its factorization.

20394474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91909.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20394474 is about 4516.0241363394. The cubic root of 20394474 is about 273.2147674671.

Adding to 20394474 its reverse (47449302), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 20394474 in words is "twenty million, three hundred ninety-four thousand, four hundred seventy-four".