21485020603 has 2 divisors, whose sum is σ = 21485020604. Its totient is φ = 21485020602.

The previous prime is 21485020573. The next prime is 21485020643. The reversal of 21485020603 is 30602058412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21485020603 - 2³³ = 12895086011 is a prime.

It is a super-2 number, since 2×21485020603² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21485020643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10742510301 + 10742510302.

It is an arithmetic number, because the mean of its divisors is an integer number (10742510302).

Almost surely, 2^21485020603 is an apocalyptic number.

21485020603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21485020603 is an equidigital number, since it uses as much as digits as its factorization.

21485020603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 21485020603 in words is "twenty-one billion, four hundred eighty-five million, twenty thousand, six hundred three".