20206215045 has 80 divisors (see below), whose sum is σ = 38501464320. Its totient is φ = 10103256576.

The previous prime is 20206214993. The next prime is 20206215067. The reversal of 20206215045 is 54051260202.

It is not a de Polignac number, because 20206215045 - 2¹² = 20206210949 is a prime.

It is a super-2 number, since 2×20206215045² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1805176 + ... + 1816334.

It is an arithmetic number, because the mean of its divisors is an integer number (481268304).

Almost surely, 2^20206215045 is an apocalyptic number.

It is an amenable number.

20206215045 is a deficient number, since it is larger than the sum of its proper divisors (18295249275).

20206215045 is a wasteful number, since it uses less digits than its factorization.

20206215045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456 (or 11447 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20206215045 its reverse (54051260202), we get a palindrome (74257475247).

The spelling of 20206215045 in words is "twenty billion, two hundred six million, two hundred fifteen thousand, forty-five".