21364244564142 has 8 divisors (see below), whose sum is σ = 42728489128296. Its totient is φ = 7121414854712.

The previous prime is 21364244564081. The next prime is 21364244564149. The reversal of 21364244564142 is 24146544246312.

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

21364244564142 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21364244564091 and 21364244564100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364244564149) 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, 1780353713673 + ... + 1780353713684.

It is an arithmetic number, because the mean of its divisors is an integer number (5341061141037).

Almost surely, 2^{21364244564142} is an apocalyptic number.

21364244564142 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.

21364244564142 is a wasteful number, since it uses less digits than its factorization.

21364244564142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560707427362.

The product of its digits is 4423680, while the sum is 48.

The spelling of 21364244564142 in words is "twenty-one trillion, three hundred sixty-four billion, two hundred forty-four million, five hundred sixty-four thousand, one hundred forty-two".