20946490 has 32 divisors (see below), whose sum is σ = 39481344. Its totient is φ = 7992960.

The previous prime is 20946487. The next prime is 20946503. The reversal of 20946490 is 9464902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18727 + ... + 19813.

It is an arithmetic number, because the mean of its divisors is an integer number (1233792).

Almost surely, 2^20946490 is an apocalyptic number.

20946490 is a deficient number, since it is larger than the sum of its proper divisors (18534854).

20946490 is a wasteful number, since it uses less digits than its factorization.

20946490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20946490 is about 4576.7335513442. The cubic root of 20946490 is about 275.6578849361.

The spelling of 20946490 in words is "twenty million, nine hundred forty-six thousand, four hundred ninety".