216710652020 has 96 divisors (see below), whose sum is σ = 463611841056. Its totient is φ = 85079808000.

The previous prime is 216710652007. The next prime is 216710652047. The reversal of 216710652020 is 20256017612.

It can be written as a sum of positive squares in 16 ways, for example, as 9718410724 + 206992241296 = 98582^2 + 454964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145150394 + ... + 145151886.

It is an arithmetic number, because the mean of its divisors is an integer number (4829290011).

Almost surely, 2^216710652020 is an apocalyptic number.

216710652020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216710652020 is an abundant number, since it is smaller than the sum of its proper divisors (246901189036).

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

216710652020 is a wasteful number, since it uses less digits than its factorization.

216710652020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 216710652020 its reverse (20256017612), we get a palindrome (236966669632).

The spelling of 216710652020 in words is "two hundred sixteen billion, seven hundred ten million, six hundred fifty-two thousand, twenty".