20742370 has 32 divisors (see below), whose sum is σ = 41155776. Its totient is φ = 7464000.

The previous prime is 20742353. The next prime is 20742377. The reversal of 20742370 is 7324702.

It is not an unprimeable number, because it can be changed into a prime (20742377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10177 + ... + 12043.

It is an arithmetic number, because the mean of its divisors is an integer number (1286118).

Almost surely, 2^20742370 is an apocalyptic number.

20742370 is a deficient number, since it is larger than the sum of its proper divisors (20413406).

20742370 is a wasteful number, since it uses less digits than its factorization.

20742370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20742370 is about 4554.3792112647. The cubic root of 20742370 is about 274.7595473917.

It can be divided in two parts, 20742 and 370, that added together give a palindrome (21112).

The spelling of 20742370 in words is "twenty million, seven hundred forty-two thousand, three hundred seventy".