20534256633 has 48 divisors (see below), whose sum is σ = 32503996224. Its totient is φ = 11395952640.

The previous prime is 20534256629. The next prime is 20534256637. The reversal of 20534256633 is 33665243502.

It is an interprime number because it is at equal distance from previous prime (20534256629) and next prime (20534256637).

It is not a de Polignac number, because 20534256633 - 2² = 20534256629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20534256591 and 20534256600.

It is not an unprimeable number, because it can be changed into a prime (20534256637) 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, 754641 + ... + 781377.

It is an arithmetic number, because the mean of its divisors is an integer number (677166588).

Almost surely, 2^20534256633 is an apocalyptic number.

It is an amenable number.

20534256633 is a deficient number, since it is larger than the sum of its proper divisors (11969739591).

20534256633 is a wasteful number, since it uses less digits than its factorization.

20534256633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26842 (or 26805 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 39.

The spelling of 20534256633 in words is "twenty billion, five hundred thirty-four million, two hundred fifty-six thousand, six hundred thirty-three".