20153493369 has 27 divisors (see below), whose sum is σ = 29533058373. Its totient is φ = 13243444344.

The previous prime is 20153493361. The next prime is 20153493427. The reversal of 20153493369 is 96339435102.

The square root of 20153493369 is 141963.

It is a perfect power (a square), and thus also a powerful number.

20153493369 is a `hidden beast` number, since 2 + 0 + 153 + 493 + 3 + 6 + 9 = 666.

It is not a de Polignac number, because 20153493369 - 2³ = 20153493361 is a prime.

It is a super-2 number, since 2×20153493369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20153493361) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33644932 + ... + 33645530.

Almost surely, 2^20153493369 is an apocalyptic number.

20153493369 is the 141963-rd square number.

20153493369 is the 70982-nd centered octagonal number.

It is an amenable number.

20153493369 is a deficient number, since it is larger than the sum of its proper divisors (9379565004).

20153493369 is an frugal number, since it uses more digits than its factorization.

20153493369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 45.

The spelling of 20153493369 in words is "twenty billion, one hundred fifty-three million, four hundred ninety-three thousand, three hundred sixty-nine".