20911038 has 16 divisors (see below), whose sum is σ = 41867280. Its totient is φ = 6962816.

The previous prime is 20911027. The next prime is 20911043. The reversal of 20911038 is 83011902.

It is a junction number, because it is equal to n+sod(n) for n = 20910999 and 20911017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8758 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (2616705).

Almost surely, 2^20911038 is an apocalyptic number.

20911038 is an abundant number, since it is smaller than the sum of its proper divisors (20956242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20911038 is a wasteful number, since it uses less digits than its factorization.

20911038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 20911038 is about 4572.8588432183. The cubic root of 20911038 is about 275.5022798375.

The spelling of 20911038 in words is "twenty million, nine hundred eleven thousand, thirty-eight".