20166744 has 64 divisors (see below), whose sum is σ = 54885600. Its totient is φ = 6137856.

The previous prime is 20166721. The next prime is 20166767. The reversal of 20166744 is 44766102.

It is an interprime number because it is at equal distance from previous prime (20166721) and next prime (20166767).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33712 + ... + 34304.

Almost surely, 2^20166744 is an apocalyptic number.

20166744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20166744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27442800).

20166744 is an abundant number, since it is smaller than the sum of its proper divisors (34718856).

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

20166744 is a wasteful number, since it uses less digits than its factorization.

20166744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20166744 is about 4490.7398054218. The cubic root of 20166744 is about 272.1940296655.

It can be divided in two parts, 20166 and 744, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20166744 in words is "twenty million, one hundred sixty-six thousand, seven hundred forty-four".