20995782 has 32 divisors (see below), whose sum is σ = 45505152. Its totient is φ = 6432384.

The previous prime is 20995781. The next prime is 20995783. The reversal of 20995782 is 28759902.

It is an interprime number because it is at equal distance from previous prime (20995781) and next prime (20995783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1993 + ... + 6779.

It is an arithmetic number, because the mean of its divisors is an integer number (1422036).

Almost surely, 2^20995782 is an apocalyptic number.

20995782 is an abundant number, since it is smaller than the sum of its proper divisors (24509370).

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

20995782 is a wasteful number, since it uses less digits than its factorization.

20995782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 20995782 is about 4582.1154503133. The cubic root of 20995782 is about 275.8739447470.

The spelling of 20995782 in words is "twenty million, nine hundred ninety-five thousand, seven hundred eighty-two".