20215545245 has 8 divisors (see below), whose sum is σ = 27724176384. Its totient is φ = 13862088144.

The previous prime is 20215545211. The next prime is 20215545277. The reversal of 20215545245 is 54254551202.

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

It is a cyclic number.

It is not a de Polignac number, because 20215545245 - 2³² = 15920577949 is a prime.

It is a super-2 number, since 2×20215545245² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 577587007 = 20215545245 / (2 + 0 + 2 + 1 + 5 + 5 + 4 + 5 + 2 + 4 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288793469 + ... + 288793538.

It is an arithmetic number, because the mean of its divisors is an integer number (3465522048).

Almost surely, 2^20215545245 is an apocalyptic number.

It is an amenable number.

20215545245 is a deficient number, since it is larger than the sum of its proper divisors (7508631139).

20215545245 is an equidigital number, since it uses as much as digits as its factorization.

20215545245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577587019.

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 20215545245 in words is "twenty billion, two hundred fifteen million, five hundred forty-five thousand, two hundred forty-five".