21426062417 has 4 divisors (see below), whose sum is σ = 21727838016. Its totient is φ = 21124286820.

The previous prime is 21426062407. The next prime is 21426062423. The reversal of 21426062417 is 71426062412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21426062417 - 2⁴ = 21426062401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21426062407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150887693 + ... + 150887834.

It is an arithmetic number, because the mean of its divisors is an integer number (5431959504).

Almost surely, 2^21426062417 is an apocalyptic number.

It is an amenable number.

21426062417 is a deficient number, since it is larger than the sum of its proper divisors (301775599).

21426062417 is an equidigital number, since it uses as much as digits as its factorization.

21426062417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301775598.

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

The spelling of 21426062417 in words is "twenty-one billion, four hundred twenty-six million, sixty-two thousand, four hundred seventeen".