21461583862 has 4 divisors (see below), whose sum is σ = 32192375796. Its totient is φ = 10730791930.

The previous prime is 21461583851. The next prime is 21461583863. The reversal of 21461583862 is 26838516412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461583863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365395964 + ... + 5365395967.

It is an arithmetic number, because the mean of its divisors is an integer number (8048093949).

Almost surely, 2^21461583862 is an apocalyptic number.

21461583862 is a deficient number, since it is larger than the sum of its proper divisors (10730791934).

21461583862 is a wasteful number, since it uses less digits than its factorization.

21461583862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10730791933.

The product of its digits is 552960, while the sum is 46.

The spelling of 21461583862 in words is "twenty-one billion, four hundred sixty-one million, five hundred eighty-three thousand, eight hundred sixty-two".