20012949 has 24 divisors (see below), whose sum is σ = 32557824. Its totient is φ = 11736000.

The previous prime is 20012939. The next prime is 20012963. The reversal of 20012949 is 94921002.

It is not a de Polignac number, because 20012949 - 2⁴ = 20012933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192 + ... + 6329.

It is an arithmetic number, because the mean of its divisors is an integer number (1356576).

Almost surely, 2^20012949 is an apocalyptic number.

It is an amenable number.

20012949 is a deficient number, since it is larger than the sum of its proper divisors (12544875).

20012949 is a wasteful number, since it uses less digits than its factorization.

20012949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569 (or 6566 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20012949 is about 4473.5834629523. The cubic root of 20012949 is about 271.5003306773.

It can be divided in two parts, 2001 and 2949, that added together give a triangular number (4950 = T₉₉).

The spelling of 20012949 in words is "twenty million, twelve thousand, nine hundred forty-nine".