20243021403 has 16 divisors (see below), whose sum is σ = 29446776576. Its totient is φ = 12267505440.

The previous prime is 20243021263. The next prime is 20243021423. The reversal of 20243021403 is 30412034202.

It is not a de Polignac number, because 20243021403 - 2¹² = 20243017307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20243021403.

It is not an unprimeable number, because it can be changed into a prime (20243021423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757650 + ... + 783912.

It is an arithmetic number, because the mean of its divisors is an integer number (1840423536).

Almost surely, 2^20243021403 is an apocalyptic number.

20243021403 is a deficient number, since it is larger than the sum of its proper divisors (9203755173).

20243021403 is a wasteful number, since it uses less digits than its factorization.

20243021403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49634.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20243021403 its reverse (30412034202), we get a palindrome (50655055605).

The spelling of 20243021403 in words is "twenty billion, two hundred forty-three million, twenty-one thousand, four hundred three".