20154435053 has 4 divisors (see below), whose sum is σ = 20313131520. Its totient is φ = 19995738588.

The previous prime is 20154435047. The next prime is 20154435061. The reversal of 20154435053 is 35053445102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20154435053 - 2¹⁶ = 20154369517 is a prime.

It is a super-2 number, since 2×20154435053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154435073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79348043 + ... + 79348296.

It is an arithmetic number, because the mean of its divisors is an integer number (5078282880).

Almost surely, 2^20154435053 is an apocalyptic number.

It is an amenable number.

20154435053 is a deficient number, since it is larger than the sum of its proper divisors (158696467).

20154435053 is a wasteful number, since it uses less digits than its factorization.

20154435053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158696466.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20154435053 in words is "twenty billion, one hundred fifty-four million, four hundred thirty-five thousand, fifty-three".