20535000551 has 12 divisors (see below), whose sum is σ = 22443958872. Its totient is φ = 18778215456.

The previous prime is 20535000523. The next prime is 20535000559. The reversal of 20535000551 is 15500053502.

It is not a de Polignac number, because 20535000551 - 2¹⁸ = 20534738407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535000551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535000559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549716 + ... + 585881.

It is an arithmetic number, because the mean of its divisors is an integer number (1870329906).

Almost surely, 2^20535000551 is an apocalyptic number.

20535000551 is a deficient number, since it is larger than the sum of its proper divisors (1908958321).

20535000551 is a wasteful number, since it uses less digits than its factorization.

20535000551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135730 (or 1135717 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The spelling of 20535000551 in words is "twenty billion, five hundred thirty-five million, five hundred fifty-one", and thus it is an aban number.