20154135252 has 12 divisors (see below), whose sum is σ = 47026315616. Its totient is φ = 6718045080.

The previous prime is 20154135179. The next prime is 20154135257. The reversal of 20154135252 is 25253145102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154135257) 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, 839755624 + ... + 839755647.

Almost surely, 2^20154135252 is an apocalyptic number.

It is an amenable number.

20154135252 is an abundant number, since it is smaller than the sum of its proper divisors (26872180364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20154135252 is a wasteful number, since it uses less digits than its factorization.

20154135252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679511278 (or 1679511276 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20154135252 in words is "twenty billion, one hundred fifty-four million, one hundred thirty-five thousand, two hundred fifty-two".