21374326400377 has 8 divisors (see below), whose sum is σ = 21376639287432. Its totient is φ = 21372013680000.

The previous prime is 21374326400311. The next prime is 21374326400423. The reversal of 21374326400377 is 77300462347312.

It can be written as a sum of positive squares in 4 ways, for example, as 13960229122921 + 7414097277456 = 3736339^2 + 2722884^2 .

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 21374326400377 - 2¹¹ = 21374326398329 is a prime.

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 21374326400377.

It is not an unprimeable number, because it can be changed into a prime (21374326400677) 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, 724514127 + ... + 724543627.

It is an arithmetic number, because the mean of its divisors is an integer number (2672079910929).

Almost surely, 2^{21374326400377} is an apocalyptic number.

It is an amenable number.

21374326400377 is a deficient number, since it is larger than the sum of its proper divisors (2312887055).

21374326400377 is a wasteful number, since it uses less digits than its factorization.

21374326400377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83339.

The product of its (nonzero) digits is 3556224, while the sum is 49.

Adding to 21374326400377 its reverse (77300462347312), we get a palindrome (98674788747689).

The spelling of 21374326400377 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred twenty-six million, four hundred thousand, three hundred seventy-seven".