20154132512 has 12 divisors (see below), whose sum is σ = 39678448446. Its totient is φ = 10077066240.

The previous prime is 20154132473. The next prime is 20154132521. The reversal of 20154132512 is 21523145102.

It can be written as a sum of positive squares in only one way, i.e., 20153777296 + 355216 = 141964^2 + 596^2 .

It is a super-2 number, since 2×20154132512² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314908289 + ... + 314908352.

Almost surely, 2^20154132512 is an apocalyptic number.

It is an amenable number.

20154132512 is a deficient number, since it is larger than the sum of its proper divisors (19524315934).

20154132512 is an equidigital number, since it uses as much as digits as its factorization.

20154132512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629816651 (or 629816643 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20154132512 its reverse (21523145102), we get a palindrome (41677277614).

The spelling of 20154132512 in words is "twenty billion, one hundred fifty-four million, one hundred thirty-two thousand, five hundred twelve".