20220861 has 8 divisors (see below), whose sum is σ = 27123264. Its totient is φ = 13399520.

The previous prime is 20220839. The next prime is 20220869. The reversal of 20220861 is 16802202.

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 20220861 - 2⁶ = 20220797 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220869) 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, 19680 + ... + 20681.

It is an arithmetic number, because the mean of its divisors is an integer number (3390408).

Almost surely, 2^20220861 is an apocalyptic number.

It is an amenable number.

20220861 is a deficient number, since it is larger than the sum of its proper divisors (6902403).

20220861 is a wasteful number, since it uses less digits than its factorization.

20220861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40531.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20220861 is about 4496.7611677740. The cubic root of 20220861 is about 272.4372877038.

The spelling of 20220861 in words is "twenty million, two hundred twenty thousand, eight hundred sixty-one".