20288078403 has 4 divisors (see below), whose sum is σ = 27050771208. Its totient is φ = 13525385600.

The previous prime is 20288078399. The next prime is 20288078407. The reversal of 20288078403 is 30487088202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20288078399) and next prime (20288078407).

It is a cyclic number.

It is not a de Polignac number, because 20288078403 - 2² = 20288078399 is a prime.

It is a super-2 number, since 2×20288078403² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20288078407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3381346398 + ... + 3381346403.

It is an arithmetic number, because the mean of its divisors is an integer number (6762692802).

Almost surely, 2^20288078403 is an apocalyptic number.

20288078403 is a deficient number, since it is larger than the sum of its proper divisors (6762692805).

20288078403 is an equidigital number, since it uses as much as digits as its factorization.

20288078403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762692804.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 20288078403 in words is "twenty billion, two hundred eighty-eight million, seventy-eight thousand, four hundred three".