20357938 has 8 divisors (see below), whose sum is σ = 30556188. Its totient is φ = 10172544.

The previous prime is 20357929. The next prime is 20357947. The reversal of 20357938 is 83975302.

It is an interprime number because it is at equal distance from previous prime (20357929) and next prime (20357947).

It can be written as a sum of positive squares in 2 ways, for example, as 19918369 + 439569 = 4463^2 + 663^2 .

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

It is a super-2 number, since 2×20357938² = 828891279223688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20357897 and 20357906.

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, 3870 + ... + 7462.

Almost surely, 2^20357938 is an apocalyptic number.

20357938 is a deficient number, since it is larger than the sum of its proper divisors (10198250).

20357938 is a wasteful number, since it uses less digits than its factorization.

20357938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20357938 is about 4511.9771719281. The cubic root of 20357938 is about 273.0515183178.

The spelling of 20357938 in words is "twenty million, three hundred fifty-seven thousand, nine hundred thirty-eight".