20430645753 has 32 divisors (see below), whose sum is σ = 32184472320. Its totient is φ = 11285360640.

The previous prime is 20430645731. The next prime is 20430645803. The reversal of 20430645753 is 35754603402.

It is not a de Polignac number, because 20430645753 - 2¹² = 20430641657 is a prime.

It is a super-2 number, since 2×20430645753² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20430645253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15000 + ... + 202697.

It is an arithmetic number, because the mean of its divisors is an integer number (1005764760).

Almost surely, 2^20430645753 is an apocalyptic number.

It is an amenable number.

20430645753 is a deficient number, since it is larger than the sum of its proper divisors (11753826567).

20430645753 is a wasteful number, since it uses less digits than its factorization.

20430645753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217857.

The product of its (nonzero) digits is 302400, while the sum is 39.

The spelling of 20430645753 in words is "twenty billion, four hundred thirty million, six hundred forty-five thousand, seven hundred fifty-three".