20154132513 has 24 divisors (see below), whose sum is σ = 30383653248. Its totient is φ = 12849198912.

The previous prime is 20154132473. The next prime is 20154132521. The reversal of 20154132513 is 31523145102.

20154132513 is a `hidden beast` number, since 2 + 0 + 15 + 4 + 132 + 513 = 666.

It is not a de Polignac number, because 20154132513 - 2¹² = 20154128417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20154132533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1528756 + ... + 1541882.

It is an arithmetic number, because the mean of its divisors is an integer number (1265985552).

Almost surely, 2^20154132513 is an apocalyptic number.

20154132513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20154132513 is a deficient number, since it is larger than the sum of its proper divisors (10229520735).

20154132513 is a wasteful number, since it uses less digits than its factorization.

20154132513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20573 (or 20570 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 20154132513 its reverse (31523145102), we get a palindrome (51677277615).

The spelling of 20154132513 in words is "twenty billion, one hundred fifty-four million, one hundred thirty-two thousand, five hundred thirteen".