20740574 has 8 divisors (see below), whose sum is σ = 31144080. Its totient is φ = 10359216.

The previous prime is 20740553. The next prime is 20740579. The reversal of 20740574 is 47504702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740579) 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, 2954 + ... + 7085.

It is an arithmetic number, because the mean of its divisors is an integer number (3893010).

Almost surely, 2^20740574 is an apocalyptic number.

20740574 is a deficient number, since it is larger than the sum of its proper divisors (10403506).

20740574 is a wasteful number, since it uses less digits than its factorization.

20740574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11074.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20740574 is about 4554.1820341308. The cubic root of 20740574 is about 274.7516170477.

It can be divided in two parts, 20740 and 574, that multiplied together give a triangular number (11904760 = T₄₈₇₉).

The spelling of 20740574 in words is "twenty million, seven hundred forty thousand, five hundred seventy-four".