20763638 has 16 divisors (see below), whose sum is σ = 35718144. Its totient is φ = 8867880.

The previous prime is 20763601. The next prime is 20763661. The reversal of 20763638 is 83636702.

It is a super-2 number, since 2×20763638² = 862257325990088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20763598 and 20763607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1883 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (2232384).

Almost surely, 2^20763638 is an apocalyptic number.

20763638 is a deficient number, since it is larger than the sum of its proper divisors (14954506).

20763638 is a wasteful number, since it uses less digits than its factorization.

20763638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20763638 is about 4556.7135086595. The cubic root of 20763638 is about 274.8534227134.

The spelling of 20763638 in words is "twenty million, seven hundred sixty-three thousand, six hundred thirty-eight".