20803552497 has 24 divisors (see below), whose sum is σ = 36984094784. Its totient is φ = 10973301984.

The previous prime is 20803552487. The next prime is 20803552537. The reversal of 20803552497 is 79425530802.

20803552497 is a `hidden beast` number, since 2 + 0 + 8 + 0 + 3 + 552 + 4 + 97 = 666.

It is not a de Polignac number, because 20803552497 - 2⁷ = 20803552369 is a prime.

It is a super-3 number, since 3×20803552497³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20803552487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12699763 + ... + 12701400.

Almost surely, 2^20803552497 is an apocalyptic number.

It is an amenable number.

20803552497 is a deficient number, since it is larger than the sum of its proper divisors (16180542287).

20803552497 is a wasteful number, since it uses less digits than its factorization.

20803552497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25401189 (or 25401186 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 20803552497 in words is "twenty billion, eight hundred three million, five hundred fifty-two thousand, four hundred ninety-seven".