20430437477 has 8 divisors (see below), whose sum is σ = 21617156160. Its totient is φ = 19254862080.

The previous prime is 20430437471. The next prime is 20430437513. The reversal of 20430437477 is 77473403402.

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 20430437477 - 2⁶ = 20430437413 is a prime.

It is a super-2 number, since 2×20430437477² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430437471) 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, 2782049 + ... + 2789382.

It is an arithmetic number, because the mean of its divisors is an integer number (2702144520).

Almost surely, 2^20430437477 is an apocalyptic number.

It is an amenable number.

20430437477 is a deficient number, since it is larger than the sum of its proper divisors (1186718683).

20430437477 is a wasteful number, since it uses less digits than its factorization.

20430437477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571643.

The product of its (nonzero) digits is 395136, while the sum is 41.

The spelling of 20430437477 in words is "twenty billion, four hundred thirty million, four hundred thirty-seven thousand, four hundred seventy-seven".