21192455429 has 8 divisors (see below), whose sum is σ = 22782483840. Its totient is φ = 19649890656.

The previous prime is 21192455413. The next prime is 21192455441. The reversal of 21192455429 is 92455429112.

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 21192455429 - 2⁴ = 21192455413 is a prime.

It is a super-2 number, since 2×21192455429² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21192455429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192455489) 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, 11864984 + ... + 11866769.

It is an arithmetic number, because the mean of its divisors is an integer number (2847810480).

Almost surely, 2^21192455429 is an apocalyptic number.

It is an amenable number.

21192455429 is a deficient number, since it is larger than the sum of its proper divisors (1590028411).

21192455429 is a wasteful number, since it uses less digits than its factorization.

21192455429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23731819.

The product of its digits is 259200, while the sum is 44.

The spelling of 21192455429 in words is "twenty-one billion, one hundred ninety-two million, four hundred fifty-five thousand, four hundred twenty-nine".