20115212052220 has 48 divisors (see below), whose sum is σ = 42312636817920. Its totient is φ = 8032622958144.

The previous prime is 20115212052197. The next prime is 20115212052241. The reversal of 20115212052220 is 2225021251102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105585811 + ... + 105776149.

It is an arithmetic number, because the mean of its divisors is an integer number (881513267040).

Almost surely, 2^{20115212052220} is an apocalyptic number.

20115212052220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115212052220 is an abundant number, since it is smaller than the sum of its proper divisors (22197424765700).

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

20115212052220 is a wasteful number, since it uses less digits than its factorization.

20115212052220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199162 (or 199160 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 20115212052220 in words is "twenty trillion, one hundred fifteen billion, two hundred twelve million, fifty-two thousand, two hundred twenty".