20386405436 has 48 divisors (see below), whose sum is σ = 37281492864. Its totient is φ = 9746485056.

The previous prime is 20386405397. The next prime is 20386405439. The reversal of 20386405436 is 63450468302.

It is a junction number, because it is equal to n+sod(n) for n = 20386405393 and 20386405402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386405439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872986 + ... + 1883838.

It is an arithmetic number, because the mean of its divisors is an integer number (776697768).

Almost surely, 2^20386405436 is an apocalyptic number.

It is an amenable number.

20386405436 is a deficient number, since it is larger than the sum of its proper divisors (16895087428).

20386405436 is a wasteful number, since it uses less digits than its factorization.

20386405436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130 (or 11128 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20386405436 in words is "twenty billion, three hundred eighty-six million, four hundred five thousand, four hundred thirty-six".