21374273422402 has 8 divisors (see below), whose sum is σ = 32061574569276. Its totient is φ = 10687081899312.

The previous prime is 21374273422367. The next prime is 21374273422409. The reversal of 21374273422402 is 20422437247312.

It can be written as a sum of positive squares in 2 ways, for example, as 11802186155761 + 9572087266641 = 3435431^2 + 3093879^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21374273422409) 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, 26916753 + ... + 27699460.

Almost surely, 2^{21374273422402} is an apocalyptic number.

21374273422402 is a deficient number, since it is larger than the sum of its proper divisors (10687301146874).

21374273422402 is a wasteful number, since it uses less digits than its factorization.

21374273422402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54811892.

The product of its (nonzero) digits is 903168, while the sum is 43.

The spelling of 21374273422402 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred seventy-three million, four hundred twenty-two thousand, four hundred two".