20763651 has 8 divisors (see below), whose sum is σ = 28207440. Its totient is φ = 13581152.

The previous prime is 20763601. The next prime is 20763661. The reversal of 20763651 is 15636702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20763651 - 2⁹ = 20763139 is a prime.

It is a super-2 number, since 2×20763651² = 862258405699602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20763601) 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 7 ways as a sum of consecutive naturals, for example, 65136 + ... + 65453.

It is an arithmetic number, because the mean of its divisors is an integer number (3525930).

Almost surely, 2^20763651 is an apocalyptic number.

20763651 is a deficient number, since it is larger than the sum of its proper divisors (7443789).

20763651 is a wasteful number, since it uses less digits than its factorization.

20763651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130645.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20763651 is about 4556.7149351260. The cubic root of 20763651 is about 274.8534800748.

The spelling of 20763651 in words is "twenty million, seven hundred sixty-three thousand, six hundred fifty-one".