20001523222 has 4 divisors (see below), whose sum is σ = 30002284836. Its totient is φ = 10000761610.

The previous prime is 20001523219. The next prime is 20001523249. The reversal of 20001523222 is 22232510002.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20001523222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001523222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000380804 + ... + 5000380807.

It is an arithmetic number, because the mean of its divisors is an integer number (7500571209).

Almost surely, 2^20001523222 is an apocalyptic number.

20001523222 is a deficient number, since it is larger than the sum of its proper divisors (10000761614).

20001523222 is a wasteful number, since it uses less digits than its factorization.

20001523222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000761613.

The product of its (nonzero) digits is 480, while the sum is 19.

The spelling of 20001523222 in words is "twenty billion, one million, five hundred twenty-three thousand, two hundred twenty-two".