20148869 has 8 divisors (see below), whose sum is σ = 21739872. Its totient is φ = 18563760.

The previous prime is 20148857. The next prime is 20148883. The reversal of 20148869 is 96884102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20148869 - 2⁸ = 20148613 is a prime.

It is a super-2 number, since 2×20148869² = 811953843958322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148809) 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, 7862 + ... + 10104.

It is an arithmetic number, because the mean of its divisors is an integer number (2717484).

Almost surely, 2^20148869 is an apocalyptic number.

It is an amenable number.

20148869 is a deficient number, since it is larger than the sum of its proper divisors (1591003).

20148869 is a wasteful number, since it uses less digits than its factorization.

20148869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20148869 is about 4488.7491576162. The cubic root of 20148869 is about 272.1135852384.

The spelling of 20148869 in words is "twenty million, one hundred forty-eight thousand, eight hundred sixty-nine".