20729150 has 24 divisors (see below), whose sum is σ = 41523384. Its totient is φ = 7653600.

The previous prime is 20729131. The next prime is 20729179. The reversal of 20729150 is 5192702.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15296 + ... + 16595.

It is an arithmetic number, because the mean of its divisors is an integer number (1730141).

Almost surely, 2^20729150 is an apocalyptic number.

20729150 is an abundant number, since it is smaller than the sum of its proper divisors (20794234).

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

20729150 is a wasteful number, since it uses less digits than its factorization.

20729150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31916 (or 31911 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20729150 is about 4552.9276295588. The cubic root of 20729150 is about 274.7011629807.

The spelling of 20729150 in words is "twenty million, seven hundred twenty-nine thousand, one hundred fifty".