20154012 has 12 divisors (see below), whose sum is σ = 47026056. Its totient is φ = 6718000.

The previous prime is 20153983. The next prime is 20154019. The reversal of 20154012 is 21045102.

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

It is a super-2 number, since 2×20154012² = 812368399392288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20153982 and 20154000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154019) 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, 839739 + ... + 839762.

It is an arithmetic number, because the mean of its divisors is an integer number (3918838).

Almost surely, 2^20154012 is an apocalyptic number.

It is an amenable number.

20154012 is an abundant number, since it is smaller than the sum of its proper divisors (26872044).

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

20154012 is a wasteful number, since it uses less digits than its factorization.

20154012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679508 (or 1679506 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20154012 is about 4489.3219978077. The cubic root of 20154012 is about 272.1367356050.

Adding to 20154012 its reverse (21045102), we get a palindrome (41199114).

The spelling of 20154012 in words is "twenty million, one hundred fifty-four thousand, twelve".