20406782054 has 8 divisors (see below), whose sum is σ = 30954107880. Its totient is φ = 10088746096.

The previous prime is 20406782029. The next prime is 20406782069. The reversal of 20406782054 is 45028760402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20406781999 and 20406782017.

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, 57322244 + ... + 57322599.

It is an arithmetic number, because the mean of its divisors is an integer number (3869263485).

Almost surely, 2^20406782054 is an apocalyptic number.

20406782054 is a deficient number, since it is larger than the sum of its proper divisors (10547325826).

20406782054 is a wasteful number, since it uses less digits than its factorization.

20406782054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114644934.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 20406782054 in words is "twenty billion, four hundred six million, seven hundred eighty-two thousand, fifty-four".