20933938 has 12 divisors (see below), whose sum is σ = 31676778. Its totient is φ = 10375680.

The previous prime is 20933929. The next prime is 20933947. The reversal of 20933938 is 83933902.

It is an interprime number because it is at equal distance from previous prime (20933929) and next prime (20933947).

It can be written as a sum of positive squares in 3 ways, for example, as 14768649 + 6165289 = 3843^2 + 2483^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20933897 and 20933906.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74358 + ... + 74638.

Almost surely, 2^20933938 is an apocalyptic number.

20933938 is a deficient number, since it is larger than the sum of its proper divisors (10742840).

20933938 is an equidigital number, since it uses as much as digits as its factorization.

20933938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 20933938 is about 4575.3620621761. The cubic root of 20933938 is about 275.6028120792.

The spelling of 20933938 in words is "twenty million, nine hundred thirty-three thousand, nine hundred thirty-eight".