213005455420 has 24 divisors (see below), whose sum is σ = 447320263824. Its totient is φ = 85200504576.

The previous prime is 213005455393. The next prime is 213005455483. The reversal of 213005455420 is 24554500312.

It is a congruent number.

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, 1664772 + ... + 1788148.

It is an arithmetic number, because the mean of its divisors is an integer number (18638344326).

Almost surely, 2^213005455420 is an apocalyptic number.

213005455420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213005455420 is an abundant number, since it is smaller than the sum of its proper divisors (234314808404).

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

213005455420 is a wasteful number, since it uses less digits than its factorization.

213005455420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209709 (or 209707 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 213005455420 its reverse (24554500312), we get a palindrome (237559955732).

The spelling of 213005455420 in words is "two hundred thirteen billion, five million, four hundred fifty-five thousand, four hundred twenty".