20154072 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 6199424.

The previous prime is 20154037. The next prime is 20154089. The reversal of 20154072 is 27045102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15379 + ... + 16637.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^20154072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20154072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

20154072 is an abundant number, since it is smaller than the sum of its proper divisors (34277928).

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

20154072 is a wasteful number, since it uses less digits than its factorization.

20154072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20154072 is about 4489.3286803263. The cubic root of 20154072 is about 272.1370056618.

Adding to 20154072 its reverse (27045102), we get a palindrome (47199174).

The spelling of 20154072 in words is "twenty million, one hundred fifty-four thousand, seventy-two".