20153798 has 12 divisors (see below), whose sum is σ = 35166492. Its totient is φ = 8637300.

The previous prime is 20153761. The next prime is 20153803. The reversal of 20153798 is 89735102.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102728 + ... + 102923.

It is an arithmetic number, because the mean of its divisors is an integer number (2930541).

Almost surely, 2^20153798 is an apocalyptic number.

20153798 is a deficient number, since it is larger than the sum of its proper divisors (15012694).

20153798 is a wasteful number, since it uses less digits than its factorization.

20153798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205667 (or 205660 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 20153798 is about 4489.2981634104. The cubic root of 20153798 is about 272.1357723978.

The spelling of 20153798 in words is "twenty million, one hundred fifty-three thousand, seven hundred ninety-eight".