20265021224 has 128 divisors (see below), whose sum is σ = 47361024000. Its totient is φ = 7932128256.

The previous prime is 20265021149. The next prime is 20265021229. The reversal of 20265021224 is 42212056202.

It is a junction number, because it is equal to n+sod(n) for n = 20265021193 and 20265021202.

It is not an unprimeable number, because it can be changed into a prime (20265021229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4434989 + ... + 4439555.

It is an arithmetic number, because the mean of its divisors is an integer number (370008000).

Almost surely, 2^20265021224 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 20265021224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23680512000).

20265021224 is an abundant number, since it is smaller than the sum of its proper divisors (27096002776).

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

20265021224 is a wasteful number, since it uses less digits than its factorization.

20265021224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735 (or 4731 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20265021224 its reverse (42212056202), we get a palindrome (62477077426).

The spelling of 20265021224 in words is "twenty billion, two hundred sixty-five million, twenty-one thousand, two hundred twenty-four".