21305424410070 has 32 divisors (see below), whose sum is σ = 51152006159712. Its totient is φ = 5679336778752.

The previous prime is 21305424410029. The next prime is 21305424410071. The reversal of 21305424410070 is 7001442450312.

It is a super-2 number, since 2×21305424410070² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21305424410071) 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, 131776027 + ... + 131937606.

It is an arithmetic number, because the mean of its divisors is an integer number (1598500192491).

Almost surely, 2^{21305424410070} is an apocalyptic number.

21305424410070 is an abundant number, since it is smaller than the sum of its proper divisors (29846581749642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21305424410070 is a wasteful number, since it uses less digits than its factorization.

21305424410070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263716336.

The product of its (nonzero) digits is 26880, while the sum is 33.

Adding to 21305424410070 its reverse (7001442450312), we get a palindrome (28306866860382).

The spelling of 21305424410070 in words is "twenty-one trillion, three hundred five billion, four hundred twenty-four million, four hundred ten thousand, seventy".