20555220734 has 16 divisors (see below), whose sum is σ = 31648719168. Its totient is φ = 10007868192.

The previous prime is 20555220703. The next prime is 20555220743. The reversal of 20555220734 is 43702255502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20555220694 and 20555220703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536489 + ... + 573524.

It is an arithmetic number, because the mean of its divisors is an integer number (1978044948).

Almost surely, 2^20555220734 is an apocalyptic number.

20555220734 is a deficient number, since it is larger than the sum of its proper divisors (11093498434).

20555220734 is a wasteful number, since it uses less digits than its factorization.

20555220734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110259.

The product of its (nonzero) digits is 84000, while the sum is 35.

The spelling of 20555220734 in words is "twenty billion, five hundred fifty-five million, two hundred twenty thousand, seven hundred thirty-four".