21361434470 has 32 divisors (see below), whose sum is σ = 38992168800. Its totient is φ = 8424311040.

The previous prime is 21361434469. The next prime is 21361434487. The reversal of 21361434470 is 7443416312.

It is a super-2 number, since 2×21361434470² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21361434470.

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, 3070556 + ... + 3077504.

It is an arithmetic number, because the mean of its divisors is an integer number (1218505275).

Almost surely, 2^21361434470 is an apocalyptic number.

21361434470 is a deficient number, since it is larger than the sum of its proper divisors (17630734330).

21361434470 is a wasteful number, since it uses less digits than its factorization.

21361434470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240.

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 21361434470 in words is "twenty-one billion, three hundred sixty-one million, four hundred thirty-four thousand, four hundred seventy".