21547474075403 has 2 divisors, whose sum is σ = 21547474075404. Its totient is φ = 21547474075402.

The previous prime is 21547474075397. The next prime is 21547474075469. The reversal of 21547474075403 is 30457047474512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21547474075403 - 2⁸ = 21547474075147 is a prime.

It is a super-2 number, since 2×21547474075403² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21547474075483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10773737037701 + 10773737037702.

It is an arithmetic number, because the mean of its divisors is an integer number (10773737037702).

Almost surely, 2^{21547474075403} is an apocalyptic number.

21547474075403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21547474075403 is an equidigital number, since it uses as much as digits as its factorization.

21547474075403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13171200, while the sum is 53.

The spelling of 21547474075403 in words is "twenty-one trillion, five hundred forty-seven billion, four hundred seventy-four million, seventy-five thousand, four hundred three".