216012020 has 48 divisors (see below), whose sum is σ = 526189440. Its totient is φ = 72952704.

The previous prime is 216011959. The next prime is 216012073. The reversal of 216012020 is 20210612.

It is a super-2 number, since 2×216012020² = 93322385568960800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 216011986 and 216012004.

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, 2135 + ... + 20894.

It is an arithmetic number, because the mean of its divisors is an integer number (10962280).

Almost surely, 2^216012020 is an apocalyptic number.

216012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216012020 is an abundant number, since it is smaller than the sum of its proper divisors (310177420).

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

216012020 is a wasteful number, since it uses less digits than its factorization.

216012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23112 (or 23110 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 216012020 is about 14697.3473797145. The cubic root of 216012020 is about 600.0111294232.

Adding to 216012020 its reverse (20210612), we get a palindrome (236222632).

The spelling of 216012020 in words is "two hundred sixteen million, twelve thousand, twenty".