20740258 has 16 divisors (see below), whose sum is σ = 38787264. Its totient is φ = 8080560.

The previous prime is 20740253. The next prime is 20740259. The reversal of 20740258 is 85204702.

It is not an unprimeable number, because it can be changed into a prime (20740253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67185 + ... + 67492.

It is an arithmetic number, because the mean of its divisors is an integer number (2424204).

Almost surely, 2^20740258 is an apocalyptic number.

20740258 is a deficient number, since it is larger than the sum of its proper divisors (18047006).

20740258 is a wasteful number, since it uses less digits than its factorization.

20740258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134697.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20740258 is about 4554.1473406116. The cubic root of 20740258 is about 274.7502216837.

The spelling of 20740258 in words is "twenty million, seven hundred forty thousand, two hundred fifty-eight".