920019138 has 16 divisors (see below), whose sum is σ = 1841316960. Its totient is φ = 306459936.

The previous prime is 920019109. The next prime is 920019151. The reversal of 920019138 is 831910029.

It is a junction number, because it is equal to n+sod(n) for n = 920019099 and 920019108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43795 + ... + 61302.

It is an arithmetic number, because the mean of its divisors is an integer number (115082310).

Almost surely, 2^920019138 is an apocalyptic number.

920019138 is an abundant number, since it is smaller than the sum of its proper divisors (921297822).

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

920019138 is a wasteful number, since it uses less digits than its factorization.

920019138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106561.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 920019138 is about 30331.8172551530. The cubic root of 920019138 is about 972.5955701594.

The spelling of 920019138 in words is "nine hundred twenty million, nineteen thousand, one hundred thirty-eight".