20406799465684 has 48 divisors (see below), whose sum is σ = 37010541496320. Its totient is φ = 9833645082240.

The previous prime is 20406799465621. The next prime is 20406799465687. The reversal of 20406799465684 is 48656499760402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20406799465687) 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, 427406317 + ... + 427454059.

It is an arithmetic number, because the mean of its divisors is an integer number (771052947840).

Almost surely, 2^{20406799465684} is an apocalyptic number.

It is an amenable number.

20406799465684 is a deficient number, since it is larger than the sum of its proper divisors (16603742030636).

20406799465684 is a wasteful number, since it uses less digits than its factorization.

20406799465684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54400 (or 54398 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 70.

The spelling of 20406799465684 in words is "twenty trillion, four hundred six billion, seven hundred ninety-nine million, four hundred sixty-five thousand, six hundred eighty-four".