20775942 has 36 divisors (see below), whose sum is σ = 49483980. Its totient is φ = 6295080.

The previous prime is 20775941. The next prime is 20775943. The reversal of 20775942 is 24957702.

It is an interprime number because it is at equal distance from previous prime (20775941) and next prime (20775943).

It is a junction number, because it is equal to n+sod(n) for n = 20775897 and 20775906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2592 + ... + 6947.

It is an arithmetic number, because the mean of its divisors is an integer number (1374555).

Almost surely, 2^20775942 is an apocalyptic number.

20775942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20775942 is an abundant number, since it is smaller than the sum of its proper divisors (28708038).

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

20775942 is a wasteful number, since it uses less digits than its factorization.

20775942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9569 (or 9555 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 20775942 is about 4558.0634045612. The cubic root of 20775942 is about 274.9077023591.

The spelling of 20775942 in words is "twenty million, seven hundred seventy-five thousand, nine hundred forty-two".