21344700471 has 16 divisors (see below), whose sum is σ = 28625880960. Its totient is φ = 14146843680.

The previous prime is 21344700463. The next prime is 21344700589. The reversal of 21344700471 is 17400744312.

It is not a de Polignac number, because 21344700471 - 2³ = 21344700463 is a prime.

It is a super-3 number, since 3×21344700471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344700431) 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, 452236 + ... + 497198.

It is an arithmetic number, because the mean of its divisors is an integer number (1789117560).

Almost surely, 2^21344700471 is an apocalyptic number.

21344700471 is a deficient number, since it is larger than the sum of its proper divisors (7281180489).

21344700471 is a wasteful number, since it uses less digits than its factorization.

21344700471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45886.

The product of its (nonzero) digits is 18816, while the sum is 33.

The spelling of 21344700471 in words is "twenty-one billion, three hundred forty-four million, seven hundred thousand, four hundred seventy-one".