20319772 has 18 divisors (see below), whose sum is σ = 39087104. Its totient is φ = 9236040.

The previous prime is 20319763. The next prime is 20319781. The reversal of 20319772 is 27791302.

It is an interprime number because it is at equal distance from previous prime (20319763) and next prime (20319781).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 20508 + ... + 21475.

Almost surely, 2^20319772 is an apocalyptic number.

20319772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20319772 is a deficient number, since it is larger than the sum of its proper divisors (18767332).

20319772 is a wasteful number, since it uses less digits than its factorization.

20319772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42009 (or 41996 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20319772 is about 4507.7457781024. The cubic root of 20319772 is about 272.8807773278.

The spelling of 20319772 in words is "twenty million, three hundred nineteen thousand, seven hundred seventy-two".