20685374 has 4 divisors (see below), whose sum is σ = 31028064. Its totient is φ = 10342686.

The previous prime is 20685373. The next prime is 20685377. The reversal of 20685374 is 47358602.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20685373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5171342 + ... + 5171345.

It is an arithmetic number, because the mean of its divisors is an integer number (7757016).

Almost surely, 2^20685374 is an apocalyptic number.

20685374 is a deficient number, since it is larger than the sum of its proper divisors (10342690).

20685374 is a wasteful number, since it uses less digits than its factorization.

20685374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342689.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20685374 is about 4548.1176326036. The cubic root of 20685374 is about 274.5076545941.

The spelling of 20685374 in words is "twenty million, six hundred eighty-five thousand, three hundred seventy-four".