20553604346 has 16 divisors (see below), whose sum is σ = 33691481280. Its totient is φ = 9326350080.

The previous prime is 20553604327. The next prime is 20553604411. The reversal of 20553604346 is 64340635502.

It is a happy number.

It is a super-2 number, since 2×20553604346² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 796886 + ... + 822273.

It is an arithmetic number, because the mean of its divisors is an integer number (2105717580).

Almost surely, 2^20553604346 is an apocalyptic number.

20553604346 is a deficient number, since it is larger than the sum of its proper divisors (13137876934).

20553604346 is a wasteful number, since it uses less digits than its factorization.

20553604346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619749.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 20553604346 in words is "twenty billion, five hundred fifty-three million, six hundred four thousand, three hundred forty-six".