20257386 has 16 divisors (see below), whose sum is σ = 41457504. Its totient is φ = 6595344.

The previous prime is 20257373. The next prime is 20257451. The reversal of 20257386 is 68375202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39001 + ... + 39516.

It is an arithmetic number, because the mean of its divisors is an integer number (2591094).

Almost surely, 2^20257386 is an apocalyptic number.

20257386 is an abundant number, since it is smaller than the sum of its proper divisors (21200118).

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

20257386 is a wasteful number, since it uses less digits than its factorization.

20257386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78565.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20257386 is about 4500.8205918477. The cubic root of 20257386 is about 272.6012237922.

The spelling of 20257386 in words is "twenty million, two hundred fifty-seven thousand, three hundred eighty-six".