21400423041 has 16 divisors (see below), whose sum is σ = 28778630400. Its totient is φ = 14145105408.

The previous prime is 21400423013. The next prime is 21400423061. The reversal of 21400423041 is 14032400412.

It is not a de Polignac number, because 21400423041 - 2²⁵ = 21366868609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21400422999 and 21400423017.

It is not an unprimeable number, because it can be changed into a prime (21400423061) 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, 99025 + ... + 229361.

It is an arithmetic number, because the mean of its divisors is an integer number (1798664400).

Almost surely, 2^21400423041 is an apocalyptic number.

It is an amenable number.

21400423041 is a deficient number, since it is larger than the sum of its proper divisors (7378207359).

21400423041 is a wasteful number, since it uses less digits than its factorization.

21400423041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130808.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21400423041 its reverse (14032400412), we get a palindrome (35432823453).

The spelling of 21400423041 in words is "twenty-one billion, four hundred million, four hundred twenty-three thousand, forty-one".