20493722 has 8 divisors (see below), whose sum is σ = 31320756. Its totient is φ = 10053472.

The previous prime is 20493719. The next prime is 20493731. The reversal of 20493722 is 22739402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20421361 + 72361 = 4519^2 + 269^2 .

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96563 + ... + 96774.

Almost surely, 2^20493722 is an apocalyptic number.

20493722 is a deficient number, since it is larger than the sum of its proper divisors (10827034).

20493722 is a wasteful number, since it uses less digits than its factorization.

20493722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193392.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20493722 is about 4526.9992268610. Note that the first 3 decimals coincide. The cubic root of 20493722 is about 273.6572427479.

The spelling of 20493722 in words is "twenty million, four hundred ninety-three thousand, seven hundred twenty-two".