20948415 has 8 divisors (see below), whose sum is σ = 33517488. Its totient is φ = 11172480.

The previous prime is 20948399. The next prime is 20948419. The reversal of 20948415 is 51484902.

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

It is not a de Polignac number, because 20948415 - 2⁴ = 20948399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20948419) 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, 698266 + ... + 698295.

It is an arithmetic number, because the mean of its divisors is an integer number (4189686).

Almost surely, 2^20948415 is an apocalyptic number.

20948415 is a deficient number, since it is larger than the sum of its proper divisors (12569073).

20948415 is a wasteful number, since it uses less digits than its factorization.

20948415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396569.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20948415 is about 4576.9438493388. The cubic root of 20948415 is about 275.6663290744. Note that the first 3 decimals are identical.

The spelling of 20948415 in words is "twenty million, nine hundred forty-eight thousand, four hundred fifteen".