191461020 has 24 divisors (see below), whose sum is σ = 536091024. Its totient is φ = 51056256.

The previous prime is 191461013. The next prime is 191461027. The reversal of 191461020 is 20164191.

It is an interprime number because it is at equal distance from previous prime (191461013) and next prime (191461027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191461027) 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, 1595449 + ... + 1595568.

It is an arithmetic number, because the mean of its divisors is an integer number (22337126).

Almost surely, 2^191461020 is an apocalyptic number.

191461020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191461020 is an abundant number, since it is smaller than the sum of its proper divisors (344630004).

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

191461020 is a wasteful number, since it uses less digits than its factorization.

191461020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191029 (or 3191027 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 191461020 is about 13836.9440267712. The cubic root of 191461020 is about 576.3595002111.

The spelling of 191461020 in words is "one hundred ninety-one million, four hundred sixty-one thousand, twenty".