20763861 has 8 divisors (see below), whose sum is σ = 28019040. Its totient is φ = 13675632.

The previous prime is 20763839. The next prime is 20763881. The reversal of 20763861 is 16836702.

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

It is not a de Polignac number, because 20763861 - 2⁵ = 20763829 is a prime.

It is a super-2 number, since 2×20763861² = 862275847254642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20763881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41446 + ... + 41943.

It is an arithmetic number, because the mean of its divisors is an integer number (3502380).

Almost surely, 2^20763861 is an apocalyptic number.

It is an amenable number.

20763861 is a deficient number, since it is larger than the sum of its proper divisors (7255179).

20763861 is an equidigital number, since it uses as much as digits as its factorization.

20763861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83475.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20763861 is about 4556.7379779838. The cubic root of 20763861 is about 274.8544066786.

The spelling of 20763861 in words is "twenty million, seven hundred sixty-three thousand, eight hundred sixty-one".