20124397569 has 16 divisors (see below), whose sum is σ = 27600034752. Its totient is φ = 13033626048.

The previous prime is 20124397541. The next prime is 20124397571. The reversal of 20124397569 is 96579342102.

It is not a de Polignac number, because 20124397569 - 2²³ = 20116008961 is a prime.

It is a super-2 number, since 2×20124397569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20124397529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66339 + ... + 211304.

It is an arithmetic number, because the mean of its divisors is an integer number (1725002172).

Almost surely, 2^20124397569 is an apocalyptic number.

It is an amenable number.

20124397569 is a deficient number, since it is larger than the sum of its proper divisors (7475637183).

20124397569 is a wasteful number, since it uses less digits than its factorization.

20124397569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278336.

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 20124397569 in words is "twenty billion, one hundred twenty-four million, three hundred ninety-seven thousand, five hundred sixty-nine".