20493357 has 8 divisors (see below), whose sum is σ = 27732576. Its totient is φ = 13458192.

The previous prime is 20493353. The next prime is 20493371. The reversal of 20493357 is 75339402.

It is a happy number.

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

It is not a de Polignac number, because 20493357 - 2² = 20493353 is a prime.

It is a super-2 number, since 2×20493357² = 839955362258898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50778 + ... + 51179.

It is an arithmetic number, because the mean of its divisors is an integer number (3466572).

Almost surely, 2^20493357 is an apocalyptic number.

It is an amenable number.

20493357 is a deficient number, since it is larger than the sum of its proper divisors (7239219).

20493357 is a wasteful number, since it uses less digits than its factorization.

20493357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102027.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 20493357 is about 4526.9589130011. The cubic root of 20493357 is about 273.6556180961.

The spelling of 20493357 in words is "twenty million, four hundred ninety-three thousand, three hundred fifty-seven".