20247553150221 has 4 divisors (see below), whose sum is σ = 26996737533632. Its totient is φ = 13498368766812.

The previous prime is 20247553150219. The next prime is 20247553150229. The reversal of 20247553150221 is 12205135574202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20247553150221 - 2¹ = 20247553150219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20247553150221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247553150229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3374592191701 + ... + 3374592191706.

It is an arithmetic number, because the mean of its divisors is an integer number (6749184383408).

Almost surely, 2^{20247553150221} is an apocalyptic number.

It is an amenable number.

20247553150221 is a deficient number, since it is larger than the sum of its proper divisors (6749184383411).

20247553150221 is an equidigital number, since it uses as much as digits as its factorization.

20247553150221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749184383410.

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 20247553150221 in words is "twenty trillion, two hundred forty-seven billion, five hundred fifty-three million, one hundred fifty thousand, two hundred twenty-one".