20450225515 has 8 divisors (see below), whose sum is σ = 24541041888. Its totient is φ = 16359666240.

The previous prime is 20450225513. The next prime is 20450225519. The reversal of 20450225515 is 51552205402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20450225515 - 2¹ = 20450225513 is a prime.

It is a super-2 number, since 2×20450225515² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20450225513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254074 + ... + 324736.

It is an arithmetic number, because the mean of its divisors is an integer number (3067630236).

Almost surely, 2^20450225515 is an apocalyptic number.

20450225515 is a deficient number, since it is larger than the sum of its proper divisors (4090816373).

20450225515 is an equidigital number, since it uses as much as digits as its factorization.

20450225515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128549.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 20450225515 in words is "twenty billion, four hundred fifty million, two hundred twenty-five thousand, five hundred fifteen".