20154028 has 6 divisors (see below), whose sum is σ = 35269556. Its totient is φ = 10077012.

The previous prime is 20154019. The next prime is 20154037. The reversal of 20154028 is 82045102.

It is an interprime number because it is at equal distance from previous prime (20154019) and next prime (20154037).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2519250 + ... + 2519257.

Almost surely, 2^20154028 is an apocalyptic number.

It is an amenable number.

20154028 is a deficient number, since it is larger than the sum of its proper divisors (15115528).

20154028 is a wasteful number, since it uses less digits than its factorization.

20154028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038511 (or 5038509 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20154028 is about 4489.3237798136. The cubic root of 20154028 is about 272.1368076202.

It can be divided in two parts, 201540 and 28, that multiplied together give a triangular number (5643120 = T₃₃₅₉).

The spelling of 20154028 in words is "twenty million, one hundred fifty-four thousand, twenty-eight".