20744371 has 4 divisors (see below), whose sum is σ = 21836200. Its totient is φ = 19652544.

The previous prime is 20744327. The next prime is 20744377. The reversal of 20744371 is 17344702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20744371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20744377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545886 + ... + 545923.

It is an arithmetic number, because the mean of its divisors is an integer number (5459050).

Almost surely, 2^20744371 is an apocalyptic number.

20744371 is a deficient number, since it is larger than the sum of its proper divisors (1091829).

20744371 is a wasteful number, since it uses less digits than its factorization.

20744371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091828.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20744371 is about 4554.5988846440. The cubic root of 20744371 is about 274.7683823863.

It can be divided in two parts, 20744 and 371, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20744371 in words is "twenty million, seven hundred forty-four thousand, three hundred seventy-one".