20406810452 has 12 divisors (see below), whose sum is σ = 40813620960. Its totient is φ = 8745775896.

The previous prime is 20406810443. The next prime is 20406810461. The reversal of 20406810452 is 25401860402.

It is an interprime number because it is at equal distance from previous prime (20406810443) and next prime (20406810461).

20406810452 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364407302 + ... + 364407357.

It is an arithmetic number, because the mean of its divisors is an integer number (3401135080).

Almost surely, 2^20406810452 is an apocalyptic number.

It is an amenable number.

20406810452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20406810452 is a wasteful number, since it uses less digits than its factorization.

20406810452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728814670 (or 728814668 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 20406810452 in words is "twenty billion, four hundred six million, eight hundred ten thousand, four hundred fifty-two".