21440532041 has 4 divisors (see below), whose sum is σ = 21534983952. Its totient is φ = 21346080132.

The previous prime is 21440532023. The next prime is 21440532067. The reversal of 21440532041 is 14023504412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21440532041 - 2⁶ = 21440531977 is a prime.

It is a super-2 number, since 2×21440532041² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21440532041.

It is not an unprimeable number, because it can be changed into a prime (21440531041) 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, 47225615 + ... + 47226068.

It is an arithmetic number, because the mean of its divisors is an integer number (5383745988).

Almost surely, 2^21440532041 is an apocalyptic number.

It is an amenable number.

21440532041 is a deficient number, since it is larger than the sum of its proper divisors (94451911).

21440532041 is an equidigital number, since it uses as much as digits as its factorization.

21440532041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94451910.

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 21440532041 in words is "twenty-one billion, four hundred forty million, five hundred thirty-two thousand, forty-one".