20485374 has 64 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 5082624.

The previous prime is 20485369. The next prime is 20485427. The reversal of 20485374 is 47358402.

Added to its reverse (47358402) it gives a triangular number (67843776 = T₁₁₆₄₈).

It is a congruent number.

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, 8179 + ... + 10385.

It is an arithmetic number, because the mean of its divisors is an integer number (834624).

Almost surely, 2^20485374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20485374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26707968).

20485374 is an abundant number, since it is smaller than the sum of its proper divisors (32930562).

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

20485374 is a wasteful number, since it uses less digits than its factorization.

20485374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 20485374 is about 4526.0771093741. The cubic root of 20485374 is about 273.6200801325.

Adding to 20485374 its reverse (47358402), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 20485374 in words is "twenty million, four hundred eighty-five thousand, three hundred seventy-four".