20420902386 has 40 divisors (see below), whose sum is σ = 45767272320. Its totient is φ = 6805580472.

The previous prime is 20420902373. The next prime is 20420902387. The reversal of 20420902386 is 68320902402.

It is a self number, because there is not a number n which added to its sum of digits gives 20420902386.

It is not an unprimeable number, because it can be changed into a prime (20420902387) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1060795 + ... + 1079873.

It is an arithmetic number, because the mean of its divisors is an integer number (1144181808).

Almost surely, 2^20420902386 is an apocalyptic number.

20420902386 is an abundant number, since it is smaller than the sum of its proper divisors (25346369934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20420902386 is a wasteful number, since it uses less digits than its factorization.

20420902386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25700 (or 25691 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20420902386 in words is "twenty billion, four hundred twenty million, nine hundred two thousand, three hundred eighty-six".