20224787137 has 8 divisors (see below), whose sum is σ = 22152911400. Its totient is φ = 18378710784.

The previous prime is 20224787123. The next prime is 20224787161. The reversal of 20224787137 is 73178742202.

It can be written as a sum of positive squares in 4 ways, for example, as 8963544976 + 11261242161 = 94676^2 + 106119^2 .

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 20224787137 - 2²⁷ = 20090569409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20224787093 and 20224787102.

It is not an unprimeable number, because it can be changed into a prime (20224787437) 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, 20511462 + ... + 20512447.

It is an arithmetic number, because the mean of its divisors is an integer number (2769113925).

Almost surely, 2^20224787137 is an apocalyptic number.

It is an amenable number.

20224787137 is a deficient number, since it is larger than the sum of its proper divisors (1928124263).

20224787137 is a wasteful number, since it uses less digits than its factorization.

20224787137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41023955.

The product of its (nonzero) digits is 263424, while the sum is 43.

The spelling of 20224787137 in words is "twenty billion, two hundred twenty-four million, seven hundred eighty-seven thousand, one hundred thirty-seven".