21471246662 has 4 divisors (see below), whose sum is σ = 32206869996. Its totient is φ = 10735623330.

The previous prime is 21471246617. The next prime is 21471246683. The reversal of 21471246662 is 26664217412.

It is a happy number.

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

It is a super-2 number, since 2×21471246662² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5367811664 + ... + 5367811667.

It is an arithmetic number, because the mean of its divisors is an integer number (8051717499).

Almost surely, 2^21471246662 is an apocalyptic number.

21471246662 is a deficient number, since it is larger than the sum of its proper divisors (10735623334).

21471246662 is a wasteful number, since it uses less digits than its factorization.

21471246662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735623333.

The product of its digits is 193536, while the sum is 41.

The spelling of 21471246662 in words is "twenty-one billion, four hundred seventy-one million, two hundred forty-six thousand, six hundred sixty-two".