20522552443251 has 32 divisors (see below), whose sum is σ = 29128614458880. Its totient is φ = 12825358850304.

The previous prime is 20522552443213. The next prime is 20522552443273. The reversal of 20522552443251 is 15234425522502.

It is not a de Polignac number, because 20522552443251 - 2¹⁷ = 20522552312179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20522552443951) 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, 12184861 + ... + 13766478.

It is an arithmetic number, because the mean of its divisors is an integer number (910269201840).

Almost surely, 2^{20522552443251} is an apocalyptic number.

20522552443251 is a deficient number, since it is larger than the sum of its proper divisors (8606062015629).

20522552443251 is a wasteful number, since it uses less digits than its factorization.

20522552443251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25951595.

The product of its (nonzero) digits is 960000, while the sum is 42.

Adding to 20522552443251 its reverse (15234425522502), we get a palindrome (35756977965753).

The spelling of 20522552443251 in words is "twenty trillion, five hundred twenty-two billion, five hundred fifty-two million, four hundred forty-three thousand, two hundred fifty-one".