20347227456 has 168 divisors, whose sum is σ = 56686850304. Its totient is φ = 6434488320.

The previous prime is 20347227431. The next prime is 20347227469. The reversal of 20347227456 is 65472274302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16718560 + ... + 16719776.

It is an arithmetic number, because the mean of its divisors is an integer number (337421728).

Almost surely, 2^20347227456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20347227456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28343425152).

20347227456 is an abundant number, since it is smaller than the sum of its proper divisors (36339622848).

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

20347227456 is a wasteful number, since it uses less digits than its factorization.

20347227456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 42.

The spelling of 20347227456 in words is "twenty billion, three hundred forty-seven million, two hundred twenty-seven thousand, four hundred fifty-six".