21310063534 has 32 divisors (see below), whose sum is σ = 32416200000. Its totient is φ = 10506123264.

The previous prime is 21310063519. The next prime is 21310063547. The reversal of 21310063534 is 43536001312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35575767 + ... + 35576365.

It is an arithmetic number, because the mean of its divisors is an integer number (1013006250).

Almost surely, 2^21310063534 is an apocalyptic number.

21310063534 is a deficient number, since it is larger than the sum of its proper divisors (11106136466).

21310063534 is a wasteful number, since it uses less digits than its factorization.

21310063534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 21310063534 its reverse (43536001312), we get a palindrome (64846064846).

The spelling of 21310063534 in words is "twenty-one billion, three hundred ten million, sixty-three thousand, five hundred thirty-four".