20430740577 has 8 divisors (see below), whose sum is σ = 29336448064. Its totient is φ = 12572763408.

The previous prime is 20430740567. The next prime is 20430740581. The reversal of 20430740577 is 77504703402.

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

It is not a de Polignac number, because 20430740577 - 2¹² = 20430736481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 523865143 = 20430740577 / (2 + 0 + 4 + 3 + 0 + 7 + 4 + 0 + 5 + 7 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430740507) 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, 261932533 + ... + 261932610.

It is an arithmetic number, because the mean of its divisors is an integer number (3667056008).

Almost surely, 2^20430740577 is an apocalyptic number.

It is an amenable number.

20430740577 is a deficient number, since it is larger than the sum of its proper divisors (8905707487).

20430740577 is a wasteful number, since it uses less digits than its factorization.

20430740577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523865159.

The product of its (nonzero) digits is 164640, while the sum is 39.

The spelling of 20430740577 in words is "twenty billion, four hundred thirty million, seven hundred forty thousand, five hundred seventy-seven".