21370531046 has 8 divisors (see below), whose sum is σ = 32308204800. Its totient is φ = 10601129448.

The previous prime is 21370531043. The next prime is 21370531109. The reversal of 21370531046 is 64013507312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370531043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42067721 + ... + 42068228.

It is an arithmetic number, because the mean of its divisors is an integer number (4038525600).

Almost surely, 2^21370531046 is an apocalyptic number.

21370531046 is a deficient number, since it is larger than the sum of its proper divisors (10937673754).

21370531046 is a wasteful number, since it uses less digits than its factorization.

21370531046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84136078.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 21370531046 in words is "twenty-one billion, three hundred seventy million, five hundred thirty-one thousand, forty-six".