20408490936 has 24 divisors (see below), whose sum is σ = 55272996480. Its totient is φ = 6802830288.

The previous prime is 20408490931. The next prime is 20408491009. The reversal of 20408490936 is 63909480402.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 20408490891 and 20408490900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408490931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141725560 + ... + 141725703.

It is an arithmetic number, because the mean of its divisors is an integer number (2303041520).

Almost surely, 2^20408490936 is an apocalyptic number.

It is an amenable number.

20408490936 is an abundant number, since it is smaller than the sum of its proper divisors (34864505544).

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

20408490936 is a wasteful number, since it uses less digits than its factorization.

20408490936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283451275 (or 283451268 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20408490936 in words is "twenty billion, four hundred eight million, four hundred ninety thousand, nine hundred thirty-six".