20524121311 has 4 divisors (see below), whose sum is σ = 20671777000. Its totient is φ = 20376465624.

The previous prime is 20524121291. The next prime is 20524121327. The reversal of 20524121311 is 11312142502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312142502 = 2 ⋅5656071251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20524121311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524121911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73827636 + ... + 73827913.

It is an arithmetic number, because the mean of its divisors is an integer number (5167944250).

Almost surely, 2^20524121311 is an apocalyptic number.

20524121311 is a deficient number, since it is larger than the sum of its proper divisors (147655689).

20524121311 is a wasteful number, since it uses less digits than its factorization.

20524121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147655688.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20524121311 its reverse (11312142502), we get a palindrome (31836263813).

The spelling of 20524121311 in words is "twenty billion, five hundred twenty-four million, one hundred twenty-one thousand, three hundred eleven".