16625820 has 24 divisors (see below), whose sum is σ = 46552464. Its totient is φ = 4433536.

The previous prime is 16625809. The next prime is 16625831. The reversal of 16625820 is 2852661.

It is an interprime number because it is at equal distance from previous prime (16625809) and next prime (16625831).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138489 + ... + 138608.

It is an arithmetic number, because the mean of its divisors is an integer number (1939686).

Almost surely, 2^16625820 is an apocalyptic number.

16625820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16625820 is an abundant number, since it is smaller than the sum of its proper divisors (29926644).

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

16625820 is a wasteful number, since it uses less digits than its factorization.

16625820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277109 (or 277107 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 16625820 is about 4077.4771611868. The cubic root of 16625820 is about 255.2276321858.

The spelling of 16625820 in words is "sixteen million, six hundred twenty-five thousand, eight hundred twenty".