20355055120 has 40 divisors (see below), whose sum is σ = 47767817664. Its totient is φ = 8065924992.

The previous prime is 20355055117. The next prime is 20355055139. The reversal of 20355055120 is 2155055302.

It is a tau number, because it is divible by the number of its divisors (40).

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, 1180404 + ... + 1197523.

Almost surely, 2^20355055120 is an apocalyptic number.

20355055120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20355055120 is an abundant number, since it is smaller than the sum of its proper divisors (27412762544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20355055120 is a wasteful number, since it uses less digits than its factorization.

20355055120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378047 (or 2378041 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The spelling of 20355055120 in words is "twenty billion, three hundred fifty-five million, fifty-five thousand, one hundred twenty".