20540755406 has 8 divisors (see below), whose sum is σ = 32150747664. Its totient is φ = 9823839520.

The previous prime is 20540755399. The next prime is 20540755421. The reversal of 20540755406 is 60455704502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20540755406.

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, 223269035 + ... + 223269126.

It is an arithmetic number, because the mean of its divisors is an integer number (4018843458).

Almost surely, 2^20540755406 is an apocalyptic number.

20540755406 is a deficient number, since it is larger than the sum of its proper divisors (11609992258).

20540755406 is a wasteful number, since it uses less digits than its factorization.

20540755406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446538186.

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 20540755406 in words is "twenty billion, five hundred forty million, seven hundred fifty-five thousand, four hundred six".