20949495 has 32 divisors (see below), whose sum is σ = 40327680. Its totient is φ = 9072000.

The previous prime is 20949421. The next prime is 20949499. The reversal of 20949495 is 59494902.

It is not a de Polignac number, because 20949495 - 2⁷ = 20949367 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3256 + ... + 7245.

It is an arithmetic number, because the mean of its divisors is an integer number (1260240).

Almost surely, 2^20949495 is an apocalyptic number.

20949495 is a deficient number, since it is larger than the sum of its proper divisors (19378185).

20949495 is a wasteful number, since it uses less digits than its factorization.

20949495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20949495 is about 4577.0618304760. The cubic root of 20949495 is about 275.6710663384.

The spelling of 20949495 in words is "twenty million, nine hundred forty-nine thousand, four hundred ninety-five".