21177462342 has 8 divisors (see below), whose sum is σ = 42354924696. Its totient is φ = 7059154112.

The previous prime is 21177462269. The next prime is 21177462347. The reversal of 21177462342 is 24326477112.

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

21177462342 is an admirable number.

It is a super-2 number, since 2×21177462342² (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 21177462342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21177462347) 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, 1764788523 + ... + 1764788534.

It is an arithmetic number, because the mean of its divisors is an integer number (5294365587).

Almost surely, 2^21177462342 is an apocalyptic number.

21177462342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21177462342 is a wasteful number, since it uses less digits than its factorization.

21177462342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529577062.

The product of its digits is 112896, while the sum is 39.

The spelling of 21177462342 in words is "twenty-one billion, one hundred seventy-seven million, four hundred sixty-two thousand, three hundred forty-two".