20286490961 has 8 divisors (see below), whose sum is σ = 22155678144. Its totient is φ = 18421463920.

The previous prime is 20286490919. The next prime is 20286490967. The reversal of 20286490961 is 16909468202.

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 20286490961 - 2¹⁸ = 20286228817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20286490967) 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, 1029830 + ... + 1049343.

It is an arithmetic number, because the mean of its divisors is an integer number (2769459768).

Almost surely, 2^20286490961 is an apocalyptic number.

It is an amenable number.

20286490961 is a deficient number, since it is larger than the sum of its proper divisors (1869187183).

20286490961 is a wasteful number, since it uses less digits than its factorization.

20286490961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080071.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 20286490961 in words is "twenty billion, two hundred eighty-six million, four hundred ninety thousand, nine hundred sixty-one".