20202861 has 8 divisors (see below), whose sum is σ = 30785344. Its totient is φ = 11544480.

The previous prime is 20202841. The next prime is 20202863. The reversal of 20202861 is 16820202.

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

It is not a de Polignac number, because 20202861 - 2⁵ = 20202829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 962041 = 20202861 / (2 + 0 + 2 + 0 + 2 + 8 + 6 + 1).

It is a Duffinian number.

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 (20202863) 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, 481000 + ... + 481041.

It is an arithmetic number, because the mean of its divisors is an integer number (3848168).

Almost surely, 2^20202861 is an apocalyptic number.

20202861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20202861 is a deficient number, since it is larger than the sum of its proper divisors (10582483).

20202861 is an equidigital number, since it uses as much as digits as its factorization.

20202861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962051.

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

The square root of 20202861 is about 4494.7592816524. The cubic root of 20202861 is about 272.3564252223.

The spelling of 20202861 in words is "twenty million, two hundred two thousand, eight hundred sixty-one".