20297742 has 8 divisors (see below), whose sum is σ = 40595496. Its totient is φ = 6765912.

The previous prime is 20297731. The next prime is 20297759. The reversal of 20297742 is 24779202.

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

20297742 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691473 + ... + 1691484.

It is an arithmetic number, because the mean of its divisors is an integer number (5074437).

Almost surely, 2^20297742 is an apocalyptic number.

20297742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20297742 is a wasteful number, since it uses less digits than its factorization.

20297742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382962.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20297742 is about 4505.3015437371. The cubic root of 20297742 is about 272.7821256739.

The spelling of 20297742 in words is "twenty million, two hundred ninety-seven thousand, seven hundred forty-two".