20250400521 has 32 divisors (see below), whose sum is σ = 29779706880. Its totient is φ = 12161346624.

The previous prime is 20250400481. The next prime is 20250400529. The reversal of 20250400521 is 12500405202.

It is a happy number.

It is not a de Polignac number, because 20250400521 - 2¹¹ = 20250398473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20250400529) 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, 2187220 + ... + 2196458.

It is an arithmetic number, because the mean of its divisors is an integer number (930615840).

Almost surely, 2^20250400521 is an apocalyptic number.

It is an amenable number.

20250400521 is a deficient number, since it is larger than the sum of its proper divisors (9529306359).

20250400521 is a wasteful number, since it uses less digits than its factorization.

20250400521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20250400521 its reverse (12500405202), we get a palindrome (32750805723).

The spelling of 20250400521 in words is "twenty billion, two hundred fifty million, four hundred thousand, five hundred twenty-one".