1020011994 has 32 divisors (see below), whose sum is σ = 2268410880. Its totient is φ = 339746400.

The previous prime is 1020011959. The next prime is 1020011999. The reversal of 1020011994 is 4991100201.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1020011999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73014 + ... + 85854.

It is an arithmetic number, because the mean of its divisors is an integer number (70887840).

Almost surely, 2^1020011994 is an apocalyptic number.

1020011994 is an abundant number, since it is smaller than the sum of its proper divisors (1248398886).

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

1020011994 is a wasteful number, since it uses less digits than its factorization.

1020011994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14323 (or 14317 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1020011994 is about 31937.6266181443. The cubic root of 1020011994 is about 1006.6266551109.

The spelling of 1020011994 in words is "one billion, twenty million, eleven thousand, nine hundred ninety-four".