20763740 has 12 divisors (see below), whose sum is σ = 43603896. Its totient is φ = 8305488.

The previous prime is 20763731. The next prime is 20763761. The reversal of 20763740 is 4736702.

It is a super-2 number, since 2×20763740² = 862265797575200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 519074 + ... + 519113.

It is an arithmetic number, because the mean of its divisors is an integer number (3633658).

Almost surely, 2^20763740 is an apocalyptic number.

20763740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20763740 is an abundant number, since it is smaller than the sum of its proper divisors (22840156).

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

20763740 is a wasteful number, since it uses less digits than its factorization.

20763740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038196 (or 1038194 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20763740 is about 4556.7247009228. The cubic root of 20763740 is about 274.8538727791.

The spelling of 20763740 in words is "twenty million, seven hundred sixty-three thousand, seven hundred forty".