21392619205476 has 192 divisors, whose sum is σ = 56192736337920. Its totient is φ = 6294369669120.

The previous prime is 21392619205427. The next prime is 21392619205537. The reversal of 21392619205476 is 67450291629312.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1549396965 + ... + 1549410771.

It is an arithmetic number, because the mean of its divisors is an integer number (292670501760).

Almost surely, 2^{21392619205476} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21392619205476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28096368168960).

21392619205476 is an abundant number, since it is smaller than the sum of its proper divisors (34800117132444).

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

21392619205476 is a wasteful number, since it uses less digits than its factorization.

21392619205476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17834 (or 17832 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 21392619205476 in words is "twenty-one trillion, three hundred ninety-two billion, six hundred nineteen million, two hundred five thousand, four hundred seventy-six".