81002094 has 16 divisors (see below), whose sum is σ = 162207360. Its totient is φ = 26966840.

The previous prime is 81002071. The next prime is 81002099. The reversal of 81002094 is 49020018.

It is a super-2 number, since 2×81002094² = 13122678464769672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81002099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3012 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (10137960).

Almost surely, 2^81002094 is an apocalyptic number.

81002094 is an abundant number, since it is smaller than the sum of its proper divisors (81205266).

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

81002094 is a wasteful number, since it uses less digits than its factorization.

81002094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16935.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 81002094 is about 9000.1163325815. The cubic root of 81002094 is about 432.6785995423.

The spelling of 81002094 in words is "eighty-one million, two thousand, ninety-four".