21292404407 has 8 divisors (see below), whose sum is σ = 21891384000. Its totient is φ = 20699506144.

The previous prime is 21292404391. The next prime is 21292404431. The reversal of 21292404407 is 70440429212.

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

It is a cyclic number.

It is not a de Polignac number, because 21292404407 - 2⁴ = 21292404391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21292404457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513232 + ... + 1527237.

It is an arithmetic number, because the mean of its divisors is an integer number (2736423000).

Almost surely, 2^21292404407 is an apocalyptic number.

21292404407 is a deficient number, since it is larger than the sum of its proper divisors (598979593).

21292404407 is a wasteful number, since it uses less digits than its factorization.

21292404407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040665.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 21292404407 in words is "twenty-one billion, two hundred ninety-two million, four hundred four thousand, four hundred seven".