20506260522 has 64 divisors (see below), whose sum is σ = 45357096960. Its totient is φ = 6128616000.

The previous prime is 20506260491. The next prime is 20506260527. The reversal of 20506260522 is 22506260502.

It is a super-2 number, since 2×20506260522² (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 20506260522.

It is not an unprimeable number, because it can be changed into a prime (20506260527) 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, 6781903 + ... + 6784925.

It is an arithmetic number, because the mean of its divisors is an integer number (708704640).

Almost surely, 2^20506260522 is an apocalyptic number.

20506260522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20506260522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22678548480).

20506260522 is an abundant number, since it is smaller than the sum of its proper divisors (24850836438).

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

20506260522 is a wasteful number, since it uses less digits than its factorization.

20506260522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 20506260522 in words is "twenty billion, five hundred six million, two hundred sixty thousand, five hundred twenty-two".