20297722 has 8 divisors (see below), whose sum is σ = 30648672. Its totient is φ = 10081500.

The previous prime is 20297713. The next prime is 20297731. The reversal of 20297722 is 22779202.

It is an interprime number because it is at equal distance from previous prime (20297713) and next prime (20297731).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33304 + ... + 33907.

It is an arithmetic number, because the mean of its divisors is an integer number (3831084).

Almost surely, 2^20297722 is an apocalyptic number.

20297722 is a deficient number, since it is larger than the sum of its proper divisors (10350950).

20297722 is a wasteful number, since it uses less digits than its factorization.

20297722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67364.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20297722 is about 4505.2993241293. The cubic root of 20297722 is about 272.7820360803.

The spelling of 20297722 in words is "twenty million, two hundred ninety-seven thousand, seven hundred twenty-two".