20432645355 has 48 divisors (see below), whose sum is σ = 36238535424. Its totient is φ = 9810408960.

The previous prime is 20432645351. The next prime is 20432645369. The reversal of 20432645355 is 55354623402.

It is not a de Polignac number, because 20432645355 - 2² = 20432645351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20432645351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2761 + ... + 202170.

It is an arithmetic number, because the mean of its divisors is an integer number (754969488).

Almost surely, 2^20432645355 is an apocalyptic number.

20432645355 is a deficient number, since it is larger than the sum of its proper divisors (15805890069).

20432645355 is a wasteful number, since it uses less digits than its factorization.

20432645355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204996 (or 204979 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 39.

The spelling of 20432645355 in words is "twenty billion, four hundred thirty-two million, six hundred forty-five thousand, three hundred fifty-five".