21354670611354 has 32 divisors (see below), whose sum is σ = 42781608815616. Its totient is φ = 7106189045760.

The previous prime is 21354670611353. The next prime is 21354670611427. The reversal of 21354670611354 is 45311607645312.

It is a super-2 number, since 2×21354670611354² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21354670611353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7196794 + ... + 9721274.

It is an arithmetic number, because the mean of its divisors is an integer number (1336925275488).

Almost surely, 2^{21354670611354} is an apocalyptic number.

21354670611354 is an abundant number, since it is smaller than the sum of its proper divisors (21426938204262).

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

21354670611354 is a wasteful number, since it uses less digits than its factorization.

21354670611354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526870.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 21354670611354 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventy million, six hundred eleven thousand, three hundred fifty-four".