20549749054 has 16 divisors (see below), whose sum is σ = 31290336000. Its totient is φ = 10120385880.

The previous prime is 20549749037. The next prime is 20549749093. The reversal of 20549749054 is 45094794502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20549748989 and 20549749007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132054 + ... + 241945.

It is an arithmetic number, because the mean of its divisors is an integer number (1955646000).

Almost surely, 2^20549749054 is an apocalyptic number.

20549749054 is a deficient number, since it is larger than the sum of its proper divisors (10740586946).

20549749054 is a wasteful number, since it uses less digits than its factorization.

20549749054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374415.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 20549749054 in words is "twenty billion, five hundred forty-nine million, seven hundred forty-nine thousand, fifty-four".