20402215633 has 16 divisors (see below), whose sum is σ = 21608294400. Its totient is φ = 19230140160.

The previous prime is 20402215607. The next prime is 20402215651. The reversal of 20402215633 is 33651220402.

It is a cyclic number.

It is not a de Polignac number, because 20402215633 - 2¹⁷ = 20402084561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20402215663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3250288 + ... + 3256558.

It is an arithmetic number, because the mean of its divisors is an integer number (1350518400).

Almost surely, 2^20402215633 is an apocalyptic number.

It is an amenable number.

20402215633 is a deficient number, since it is larger than the sum of its proper divisors (1206078767).

20402215633 is a wasteful number, since it uses less digits than its factorization.

20402215633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8952.

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 20402215633 in words is "twenty billion, four hundred two million, two hundred fifteen thousand, six hundred thirty-three".