213534020 has 24 divisors (see below), whose sum is σ = 512481984. Its totient is φ = 73211616.

The previous prime is 213534007. The next prime is 213534023. The reversal of 213534020 is 20435312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 213533983 and 213534001.

It is not an unprimeable number, because it can be changed into a prime (213534023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762482 + ... + 762761.

It is an arithmetic number, because the mean of its divisors is an integer number (21353416).

Almost surely, 2^213534020 is an apocalyptic number.

213534020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213534020 is an abundant number, since it is smaller than the sum of its proper divisors (298947964).

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

213534020 is a wasteful number, since it uses less digits than its factorization.

213534020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525259 (or 1525257 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 213534020 is about 14612.8032902657. The cubic root of 213534020 is about 597.7079404396.

Adding to 213534020 its reverse (20435312), we get a palindrome (233969332).

The spelling of 213534020 in words is "two hundred thirteen million, five hundred thirty-four thousand, twenty".