190821016 has 8 divisors (see below), whose sum is σ = 357789420. Its totient is φ = 95410504.

The previous prime is 190821013. The next prime is 190821031. The reversal of 190821016 is 610128091.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190821013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11926306 + ... + 11926321.

Almost surely, 2^190821016 is an apocalyptic number.

It is an amenable number.

190821016 is a deficient number, since it is larger than the sum of its proper divisors (166968404).

190821016 is a wasteful number, since it uses less digits than its factorization.

190821016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23852633 (or 23852629 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 190821016 is about 13813.7980295066. The cubic root of 190821016 is about 575.7165770631.

The spelling of 190821016 in words is "one hundred ninety million, eight hundred twenty-one thousand, sixteen".