20503403349 has 32 divisors (see below), whose sum is σ = 32661619200. Its totient is φ = 11276007360.

The previous prime is 20503403341. The next prime is 20503403363. The reversal of 20503403349 is 94330430502.

It is not a de Polignac number, because 20503403349 - 2³ = 20503403341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503403341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379719 + ... + 430340.

It is an arithmetic number, because the mean of its divisors is an integer number (1020675600).

Almost surely, 2^20503403349 is an apocalyptic number.

It is an amenable number.

20503403349 is a deficient number, since it is larger than the sum of its proper divisors (12158215851).

20503403349 is a wasteful number, since it uses less digits than its factorization.

20503403349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810145.

The product of its (nonzero) digits is 38880, while the sum is 33.

The spelling of 20503403349 in words is "twenty billion, five hundred three million, four hundred three thousand, three hundred forty-nine".