20763873 has 24 divisors (see below), whose sum is σ = 32631872. Its totient is φ = 12646368.

The previous prime is 20763839. The next prime is 20763881. The reversal of 20763873 is 37836702.

It is not a de Polignac number, because 20763873 - 2¹³ = 20755681 is a prime.

It is a super-2 number, since 2×20763873² = 862276843920258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20763823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11190 + ... + 12912.

Almost surely, 2^20763873 is an apocalyptic number.

It is an amenable number.

20763873 is a deficient number, since it is larger than the sum of its proper divisors (11867999).

20763873 is a wasteful number, since it uses less digits than its factorization.

20763873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20763873 is about 4556.7392947150. The cubic root of 20763873 is about 274.8544596273.

The spelling of 20763873 in words is "twenty million, seven hundred sixty-three thousand, eight hundred seventy-three".