20526400213 has 4 divisors (see below), whose sum is σ = 22392436608. Its totient is φ = 18660363820.

The previous prime is 20526400211. The next prime is 20526400247. The reversal of 20526400213 is 31200462502.

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 20526400213 - 2¹ = 20526400211 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 (20526400211) 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, 933018181 + ... + 933018202.

It is an arithmetic number, because the mean of its divisors is an integer number (5598109152).

Almost surely, 2^20526400213 is an apocalyptic number.

It is an amenable number.

20526400213 is a deficient number, since it is larger than the sum of its proper divisors (1866036395).

20526400213 is a wasteful number, since it uses less digits than its factorization.

20526400213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866036394.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20526400213 its reverse (31200462502), we get a palindrome (51726862715).

The spelling of 20526400213 in words is "twenty billion, five hundred twenty-six million, four hundred thousand, two hundred thirteen".