21357055474653 has 16 divisors (see below), whose sum is σ = 28724973428736. Its totient is φ = 14113780052400.

The previous prime is 21357055474639. The next prime is 21357055474673. The reversal of 21357055474653 is 35647455075312.

It is not a de Polignac number, because 21357055474653 - 2⁵ = 21357055474621 is a prime.

It is a super-2 number, since 2×21357055474653² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21357055474593 and 21357055474602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21357055474673) 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, 23656323 + ... + 24542528.

It is an arithmetic number, because the mean of its divisors is an integer number (1795310839296).

Almost surely, 2^{21357055474653} is an apocalyptic number.

It is an amenable number.

21357055474653 is a deficient number, since it is larger than the sum of its proper divisors (7367917954083).

21357055474653 is a wasteful number, since it uses less digits than its factorization.

21357055474653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48200144.

The product of its (nonzero) digits is 52920000, while the sum is 57.

The spelling of 21357055474653 in words is "twenty-one trillion, three hundred fifty-seven billion, fifty-five million, four hundred seventy-four thousand, six hundred fifty-three".