20573549834 has 16 divisors (see below), whose sum is σ = 30996937440. Its totient is φ = 10241274000.

The previous prime is 20573549827. The next prime is 20573549839. The reversal of 20573549834 is 43894537502.

It is not an unprimeable number, because it can be changed into a prime (20573549839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327112 + ... + 1342524.

It is an arithmetic number, because the mean of its divisors is an integer number (1937308590).

Almost surely, 2^20573549834 is an apocalyptic number.

20573549834 is a deficient number, since it is larger than the sum of its proper divisors (10423387606).

20573549834 is a wasteful number, since it uses less digits than its factorization.

20573549834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18325.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 20573549834 in words is "twenty billion, five hundred seventy-three million, five hundred forty-nine thousand, eight hundred thirty-four".