264223436220 has 36 divisors (see below), whose sum is σ = 801477757080. Its totient is φ = 70459582944.

The previous prime is 264223436203. The next prime is 264223436237. The reversal of 264223436220 is 22634322462.

264223436220 is a `hidden beast` number, since 2 + 6 + 4 + 2 + 23 + 4 + 3 + 622 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (264223436203) and next prime (264223436237).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733953810 + ... + 733954169.

It is an arithmetic number, because the mean of its divisors is an integer number (22263271030).

Almost surely, 2^264223436220 is an apocalyptic number.

264223436220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264223436220 is an abundant number, since it is smaller than the sum of its proper divisors (537254320860).

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

264223436220 is a wasteful number, since it uses less digits than its factorization.

264223436220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467907994 (or 1467907989 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 264223436220 its reverse (22634322462), we get a palindrome (286857758682).

The spelling of 264223436220 in words is "two hundred sixty-four billion, two hundred twenty-three million, four hundred thirty-six thousand, two hundred twenty".