20496990 has 32 divisors (see below), whose sum is σ = 49890816. Its totient is φ = 5388320.

The previous prime is 20496977. The next prime is 20497003. The reversal of 20496990 is 9969402.

It is an interprime number because it is at equal distance from previous prime (20496977) and next prime (20497003).

It is a congruent number.

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, 2682 + ... + 6941.

It is an arithmetic number, because the mean of its divisors is an integer number (1559088).

Almost surely, 2^20496990 is an apocalyptic number.

20496990 is an abundant number, since it is smaller than the sum of its proper divisors (29393826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20496990 is a wasteful number, since it uses less digits than its factorization.

20496990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9704.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 20496990 is about 4527.3601579729. The cubic root of 20496990 is about 273.6717880859.

The spelling of 20496990 in words is "twenty million, four hundred ninety-six thousand, nine hundred ninety".